Simple Molecules & Covalent Bonding quiz

1. State the mass and charge of an electron

Electron: mass=negligible, charge=-1

Electron: mass=1, charge=0

Electron: mass=negligible, charge=0

Electron: mass=1, charge=-1

Question 1 of 16

2. Explain, in terms of electrons, why isotopes have the same chemical properties

Isotopes have different masses

Isotopes have the same number of protons but a different number of neutrons

Isotopes have the same number of electrons

Isotopes are radioactive

Question 2 of 16

3. On the Periodic table what is the meaning of the word Group?

A Group is collection of elements with the same number of electron shells

A Group is a vertical column of similar elements

A Group is a collection of similar elements

A Group is a horizontal row of elements

Question 3 of 16

4. Describe the formation of a covalent bond

The electrostatic attraction between positive metal ions and a sea of delocalised electrons

The transfer of electrons from one atom to another

The sharing of a single electron between two nuclei

The sharing of a pair of electrons between two nuclei

Question 4 of 16

5. What colour is anhydrous copper (II) sulfate?

White

Cream

Blue

Purple

Question 5 of 16

6. Why is the boiling point of a larger molecule higher than that of a smaller molecule?

Larger molecules have fewer attractions between them. These take more energy to overcome.

Larger molecules have more attractions between them. These take more energy to overcome.

Larger molecules have more attractions between them. These take less energy to overcome.

Larger molecules have fewer attractions between them. These take less energy to overcome.

Question 6 of 16

7. How many electrons in a helium atom?

2

4

1

3

Question 7 of 16

8. What is special about the elements in group 0?

They have the same number of electrons

They are all coloured gases

They are all diatomic

They are very unreactive (because they have full outer electron shells)

Question 8 of 16

9. On the Periodic Table what is the meaning of the word Period? What does that tell us about the electron configuration of the atom?

same number of electrons in the outer shell

Same number of electrons in the inner shell

same number of electron shells

Same electronic configuration

Question 9 of 16

10. Where are the transition metals on the Periodic Table?

Left hand colunm

In the middle

Scattered across it

Top left corner

Question 10 of 16

11. Explain why nitrogen gas, N₂, is a gas at room temperature

Nitrogen has a simple molecular structure with weak intermolecular forces that require little energy to overcome

Nitrogen has a simple molecular structure with strong intermolecular forces that require a lot of energy to overcome

Nitrogen has a giant covalent structure with many strong covalent bonds which require a lot of energy to overcome

Nitrogen has a giant covalent structure with many weak covalent bonds which require little energy to overcome

Question 11 of 16

12. What is the total number of atoms in the formula Be(OH)₂ ?

5

4

3

2

Question 12 of 16

13. Which gas will turn damp red litmus paper blue?

Ammonia

Carbon dioxide

Chlorine

Hydrogen

Question 13 of 16

14. In the dot and cross diagram of the outer electrons showing the covalent bonding of ammonia (NH₃), how many electrons should be shown in areas 1, 2, 3 and 4?

There should be 2 electrons in each of the areas 1, 2, 3 and 4

There should be 2 electrons in each of the areas 1, 2, 3 but none in 4

There should be one electron in each of the areas 1, 2, 3 and seven electrons in 4

There should be one electron in each of the areas 1, 2, 3 and five electrons in 4

Question 14 of 16

15. Explain how the atoms are held together in a hydrogen bromide molecule

A shared pair of electrons is attracted to 2 nuclei

A single electron is transferred from bromine to hydrogen

A shared pair of electrons is attracted to one nucleus

A pair of electrons is transferred from bromine to hydrogen

Question 15 of 16

16. How many neutrons in a typical atom of magnesium?

11

12

24

13

Question 16 of 16

Simple Molecules & Covalent Bonding quiz

Simple Molecules & Covalent Bonding quiz

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