Identify the group number and generic outer electron configuration for a neutral main‑group element with the following two Lewis dot symbols.
X with 1 dot on the top, bottom and right
X with 1 dot on all sides
Answers
Answer: Answer to #1 is 3A and ns2np1
Answer to #2 is 4A and ns2np2
Explanation:Group number is the number of valance electrons and generic outer electron configuration has to add up to equal the number of valance electrons
The element in the first diagram is in group 13 while the element in the second diagram is in group 14.
The Lewis structure of an atom of an element is a representation of the number of valence electrons on the outermost shell of the atom of that element. Every group of elements have a generic electron configuration which represents the number of valence electrons contained by atoms of elements in that group.
In the first diagram, the element X belongs to group 3A(13) and has a generic outer electron configuration, ns2np1. In the second diagram, the element X is in group 4A(14) and has outer electron configuration ns2np2.
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Related Questions
pls answer this it's due today
Answers
Answer:
That's pretty easy,if you have a grasp of Elements, Compounds and their Symbols ans Molecular formula.
So, Let's get started!
Our reactions are as follows:
Sodium(Na) + Chlorine(Cl) ---> Sodium chloride(NaCl)Think of a compound that has both Sodium and Chlorine and is very common.
Common salt — Sodium chloride!
Yeah, that's it! It has both Sodium and Chlorine in it's molecular formula. (NaCl)
Magnesium(Mg) + Oxygen(O2) ---> Magnesium oxide(MgO)Now, we have to, somehow, get Magnesium oxide using Oxygen. The best way is: by reacting Magnesium with Oxygen.
Iron(Fe) + Sulfur(S) ---> Iron Sulfide(FeS)Now, we have to get two reactants that react to form Iron Sulfide.
FeS contains only two elements in its formula and that are: Iron(Fe) and Sulfur(S).
So, the best way would be to react Iron(Fe) and Sulfur(S) and get Iron Sulfide (FeS)
Hydrogen(H2) + Oxygen(O2) ---> water(H2O)You must know that water is H2O, that is, a compound of Hydrogen and Oxygen, the easiest way to get H2O as your product would be : by reacting Oxygen and Hydrogen.
b) magnesium (Mg)
c) Iron (Fe) + Sulfur (S)
d) oxygen (O2)
A sealed flask initially contains pure nitrogen dioxide gas (NO,). Over time, the nitrogen dioxide forms dinitrogen tetroxide gas (N,O.). The graph below shows the relative amounts of (NO,) and (N20.) over time. What is true about the time indicated by the blue arrow?
Answers
This problem is providing information about the equilibrium reaction whereby nitrogen dioxide gas produced dinitrogen tetroxide gas as shown on the attached picture and the following chemical equation:
NO₂ (g) ⇄ N₂O₄ (g)
In such a way, we can consider the given choices to reason the following: the blue arrow is pointing out the arrival to the equilibrium condition for the reaction, a point in which the rate of the forward reaction (formation of N₂O₄) is equal to the rate of the reverse reaction (formation of NO₂), because the molecules will fluctuate to the same relative amounts defined by the equilibrium constant.
Therefore the answer will be the first one on the attached file, which can vary on your online homework format.
It is important to note that the reactant is not used up at any point of the graph (concentration drops to 0) and also, the activation energy cannot be analyzed with this sparse information.
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(equilibrium concentrations) https://brainly.com/question/7949757calculate the molarity of a 50.0 ml of a 0.150 m hcl solution when 30.0 ml of water is added.
Answers
Answer:
0.09375 M
Explanation:
You want to use the following equation:
M1*V1=M2*V2
Then plug in the 50ml to V1 and 0.15M to M1 and 80ml to V2 (add the 50 and 30). The next thing you want to do is change the mL to liters, since Molarity is moles/liter. Once that is done, solve algebraically for answer.
** Also don't forget to capitalize the M when you mean Molarity, because it is different than m.**
Hope this helps!
Please help me with this three questions
Answers
Answer:
1. A. Thyroid Gland Function
B. detecting Blood Clots
C. Treating Cancer
2. An example would be how many are used as tracers for diagnostic purposes
3. Beneficial because it gives us ways to eleminate pests, by the sterile insect technique
Number three is kinda iffy a bit difficult to explain it may be explained better in your book.
what mass does a nuetron have?
Answers
Answer:
1 AMU
Explanation:
Protons, neutrons, and electrons: Both protons and neutrons have a mass of 1 amu and are found in the nucleus.
A substance that takes the shape and volume of its container is in this phase is called a liquid
Answers
Answer:
liquid matter
Explanation:
Based on the graph, what is the approximate half-life of the reaction shown below
Answers
Answer: 2.1 minutes
Explanation: Based on the graph, what is the approximate half-life of the reaction shown below
URGENT PLEASE HELP
What most likely happens when a sodium atom comes near an atom having seven valence electrons?
Answers
Answer:
7 Electrons
Explanation:
What it is fill its valence shell, it would need to acquire 7 electrons - a difficult task for a metal like sodium that is a known electron-loser. So unlike fluorine and oxygen, sodium acquires a full octet by losing electrons and emptying out its outermost shell.
4. Initially, 1 mol of oxygen (assumed to be an ideal gas) has temperature 310 K and volume 12 L. We will allow it to expand to volume 19 L. (a) What would be the final temperature if the gas expands adiabatically
Answers
Answer:
490.83 oK
Explanation:
First of all, we better agree on the meaning of the word adiabatically. It means without the loss or gain of heat. So nothing is given up to or taken from the environment.
This also assumes that no change has occurred in the pressure.
T1 = 310 oK
T2 = ?
V1 = 12 L
V2 = 19 L
T1/V1 = T2/V2
310 / 12 = x/19 Multiply both sides by 19
310*19 / 12 = T2 Multiply 310 * 19 on the left.
5890 / 12 = T2 Divide by 12
490.83 = T2
How to get your crush to like you back
Answers
i’m just going to say this…
if people stop talking to you, or seeing you it’s for a reason. things don’t happen on accident, so if your crush stopped liking you then it was for a reason wether you realize it or not.
hope this helps!
Help. 50 points. Need honest answers.
Answers
Answer:
ok
Explanation:
A force is a push or a pull under the right circumstances anything can exert a force push a notebook or some other object so that it slides across a table or desktop what force causes the notebook to start moving what force causes the notebook to stop moving?
Answers
Answer:
the force that you applied caused the notebook to move.the force applied on the notebook by the table causes it to stop moving. this is because after sometime the book uses up the force and later the force you applied is less than that of the force by the table.
How does a paper bag wrapped around a hot water bottle create convection?
Answers
Heat is a form of energy. You need energy to heat something up: for example, a cup of tea. To make your tea you probably use energy from electricity or gas. However, once your tea is hot, it won't stay hot forever. Just leave the cup of tea out on the table for a while, and you already know that it will become cooler the longer you wait. This is due to a phenomenon called heat transfer, which is the flow of energy in the form of heat. If two objects have different temperatures, heat automatically flows from one object to the other once they are in contact. The heat energy is transferred from the hotter to the colder object. In the case of the tea, the heat of the liquid is transferred to its surrounding air, which is usually colder than the tea. Once both objects reach the same temperature, the heat transfer will stop. Heat transfer via movement of fluids (liquids or gases) is called convection.
Want to keep warm this winter? Try this "cool" activity and find out what types of insulation work best--and why. Credit: George Retseck
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Key concepts
Physics
Heat transfer
Insulation
Material science
Introduction
What do you do when it gets very cold in winter? You probably turn your heater on, put on an extra layer of clothes or cuddle under a warm blanket. But have you ever thought about why a jacket helps you stay warm? Why are our clothes made from fabrics and not foils? Find out the answers in this activity; your results might even help you find the best way to stay warm in the cold!
Background
Heat is a form of energy. You need energy to heat something up: for example, a cup of tea. To make your tea you probably use energy from electricity or gas. However, once your tea is hot, it won't stay hot forever. Just leave the cup of tea out on the table for a while, and you already know that it will become cooler the longer you wait. This is due to a phenomenon called heat transfer, which is the flow of energy in the form of heat. If two objects have different temperatures, heat automatically flows from one object to the other once they are in contact. The heat energy is transferred from the hotter to the colder object. In the case of the tea, the heat of the liquid is transferred to its surrounding air, which is usually colder than the tea. Once both objects reach the same temperature, the heat transfer will stop. Heat transfer via movement of fluids (liquids or gases) is called convection.
Another type of heat transfer is conduction, in which energy moves through a substance (usually a solid) from one particle to another (unlike in convection where it’s the heated matter itself that moves). A pot handle getting hot would be an example of conduction.
How do you break down an element?
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Answer:
elements cannot be break downwhy is xenon monatomic but bromine is diatomic
Answers
If it’s needs
Hellpppppppppppppppppppppp
Answers
Answer:
SnH4
Explanation:
Because the melting point of SnH4 is higher than CH4
application of electroplating
Answers
Answer:
are you interested in tun
Which of the following is a binary compound?
Answers
Took the test already.
Why are metals sometimes added to gold?
to make it softer and more malleable
to improve the value of gold
to raise its melting point
to make gold stronger and more durable
Answers
What type of mixture is throughly mixing powdered lemonade with water
Answers
Answer:
I believe it would be a solution I could be wrong tho
Explanation:
Answer:
a solution
Homogeneous mixtures (solutions)
Explanation:
Lemonade is a special type of mixture called a solution.
...................................................................................................................................................
What type of mixture is made by thoroughly mixing powdered lemonade with water?
Homogeneous mixtures (solutions)
Mixtures with substances dissolved evenly into one another, like pink lemonade powder dissolved in water, are called homogeneous mixtures, or solutions.
what makes matter change from one state to another?
Answers
Answer: Adding or removing energy from matter
Explanation:
What is the molarity of a 75.0 mL solution that contains 0.225 g of
potassium nitrate?
Answers
Answer:
M=0.0297M
Explanation:
we know that molarity equals number of mole of solute over the volume of solution.
M=n/V but n=m/M
n=0.225g÷101g/mol =0.00223mol
M=0.00223mol/0.075l
M=0.0297M
Answer:
0.0297M
Explanation:
We will use the formula M= moles of solute/lites of solution.
First we need to figure out the Moles of the solute, to get this we first need the molar mass of KNO3 (potassimum nitrate).
The Molar Mass of potassimum nitrate is 101.103 g/mol
K - 1 x 39.09
N - 1 x 14.006
O - 3 x 15.999
KNO3 - 101.103 g/mol
Now we get the moles of the solute by doing.
0225g/ 101.103g/mol = 0.00223 mol
Put the answer into the orginal equation to get 0.00223mol / 0.045 L
Which equals to 0.0297M. This is also the correct amount of significant figures.
what is the difference between hypertonic and hypotonic
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Picture:
Meaning of hypertonic: (1): having a higher osmotic pressure than a particular fluid, typically a body fluid or intracellular fluid. (2) of or in a state of abnormally high muscle tone.
giving brainly if correct and explained
Answers
Answer:
D.
Explanation:
A concentrated solution is one that has a lot of solute (the substance being dissolved) in the solvent (the substance doing the dissolving). When a solution is concentrated, it means it has a high ratio of solute to solvent, so the answer is D.
Hope this helps.
Note the mass of copper(1) oxide formula unit 143.091 what is the mass of 8.250 moles of Cu2O
Answers
Answer:
The mass of 8.250 moles of Cu2O is 1180.5g
Explanation:
HOW TO CALCULATE MASS OF A SUBSTANCE:
The mass of a substance can be calculated by multiplying the number of moles in the substance by its molar mass as follows:Mass (g) = no. of moles (mol) × molar mass (g/mol)
Molar mass of copper (I) oxide (Cu2O) = 63.5(2) + 16 = 143.09 g/molMass of Cu2O = 8.250 mol × 143.09 g/mol
Mass of Cu2O = 1180.5 g
Therefore, the mass of 8.250 moles of Cu2O is 1180.5 g.
during hybridization ______.
A) nature selects which organisms will survive and reproduce.
B) the nucleus of a cell is removed.
C) two organisms with desired traits are bred.
D) a single beneficial trait is bred into a species.
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Answer:
option C two organisms with desired traits are bred
For the balanced equation shown below, how many grams of CO2 will be
produced from 74.23 grams of CO? CO + Fe3O4 → 3FeO + CO2
Answers
Answer:
116.64 g
Explanation:
74.23÷14 This is # of moles .
# of moles for co = 5.302
Then mass of co2 = 116.64
Which of the following methods will usually cause a reaction to speed up?
Group of answer choices
Removing the catalyst.
Combining the reactants at a lower temperature.
Grinding one of the reactants into a powder.
Reducing the concentration of reactants.
Answers
the method that will usually cause a reaction to speed up from the list given is: Reducing the concentration of reactants.
Meaning of ReactionReaction can be defined as the combination of substances or a process where substances acts on each other, where substances changes into different substances.
A reaction can be said to be the event that causes a restructuring or rearrangement of atoms of a substance when it is in contact with another substance.
In conclusion, the method that will usually cause a reaction to speed up from the list given is Reducing the concentration of reactants.
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#SPJ2
Elements are usually dull, brittle and do not conduct electricity are know as_____.
Points: 46
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Answer:
nonmetals. it's one of them
A chemist heats a gas within a sealed, rigid container. Which statement describes the changes that occur in the gas? (1 point)
-The gas particles move slower and hit the sides of the container with less force, consequently, the pressure
increases
-The gas particles move slower and hit the sides of the container with less force, consequently, the pressure decreases
-The gas particles move faster and hit the sides of the container with more force, consequently, the pressure
increases
-The gas particles move faster and hit the sides of the container with more force, consequently, the pressure
decreases
Answers
When a gas is heated in a sealed container, the gas particles move faster and hit the sides of the container with more force leading to an increase in the pressure of the gas.
An increase in the temperature of a gas increases the collision rate of the molecules of the gas according to the kinetic theory.
With increased kinetic energy, the molecules of the gases collide more frequently with each other and the walls of the container.
The collision creates an increase in the magnitude of pressure inside the container.
More on the kinetic theory of gases can be found here: https://brainly.com/question/15354399?referrer=searchResults
Answer:
C
Explanation:
When a gas is heated in a sealed container, the gas particles move faster and hit the sides of the container with more force leading to an increase in the pressure of the gas.
