Consider the group 1A elements sodium (period 3), potassium (period 4), and rubidium (period 5). What would you predict about the ionization energies of these elements?

Answers

Answer 1

Answer: It can be predicted that the ionization energies of these elements increase as you go up a period. This means that sodium has the greatest ionization energy, while rubidium has the least. This is due to the placement or distance of the valence electrons from the nucleus of these elements. When you go up a period, this distance decreases, making it harder to overcome the attraction between the nucleus and the electrons. The harder it is to overcome this attraction, the higher the ionization energy needed.

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A. Chlorine
B. Sulfur
C. Oxygen
D. None of the above

Answers

Answer:

D. None of the above

Explanation:

All the answer choices listed only have 2-3 items in the electron configuration.

Which of the following atoms would have the smallest atomic radius?

Answers

Answer:

Lithuim is the smallest

Explanation:

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How many mole of chlorine gas react with 0.100 mol of metal iron?
Fe+Cl2-> FeCl2

Answers

                       2 mol Cl
.100 mol Fe  x ------------- = .05 mol Cl
                        1 mol Fe

Why does a heating curve have horizontal plateaus at certain points during the heating process? What is happening at those points?

Answers

A heating curve having horizontal plateaus at certain points during the heating process means that the process occurs at increase heating.

2 How many
molecules of water are
there in 1g of water CH₂)

Answers

Answer:

3.3345 x 10^22

The molar mass of the water molecule is 18 g/mol. It implies that 1 mol of water molecules weigh 18 g.

Now you can calculate easily the number of water molecules present in 1 g of water. Calculation follows

18 g of water contains 1 mol of water molecules.

or 18 g of water contains 6.022 x 10^23 water molecules.

or 1 g of water contains (6.022 x 10^23)/ 18 water molecules and the number comes out to be 3.3455 x 10^22.

So the number of water molecules present in 1 g of water is 3.3455 x 10^22.

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A substance that is present in a reaction but not used up in the reaction is called a _____.

Answers

They are called spectator ions.

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Which force holds the nucleus of an atom together?A. Strong nuclear forceB. Weak nuclear forceC. Electrostatic forceD. Gravity

Assuming constant pressure and temperature, how many moles of gas have been added to the initial 3 moles of gas when the volume increases from 2.0 to 4.0 liters?1.5 moles 2 moles 3 moles 6 moles

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