Simple Molecules & Covalent Bonding quiz

1. 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 less 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 more energy to overcome.

Question 1 of 16

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

A pair of electrons is transferred from bromine to hydrogen

A single electron is transferred from bromine to hydrogen

A shared pair of electrons is attracted to 2 nuclei

A shared pair of electrons is attracted to one nucleus

Question 2 of 16

3. In the dot and cross diagram of the outer electrons showing the covalent bonding of carbon dioxide (CO₂), how many electrons should be shown in areas 1, 2, 3 and 4?

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

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

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

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

Question 3 of 16

4. What is the atomic number of a chlorine atom?

17

35.5

18

32

Question 4 of 16

5. How many electrons in a calcium atom?

41

20

19

40

Question 5 of 16

6. On the Periodic table what is the meaning of the word Group? What does that tell us about the electron configuration of the atom?

Same number of electron shells

Same electronic configuration

Same number of electrons in the inner shell

same number of electrons in the outer shell

Question 6 of 16

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

A Group is a vertical column of similar elements

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

A Group is a horizontal row of elements

A Group is a collection of similar elements

Question 7 of 16

8. Explain why carbon dioxide gas, CO₂, is a gas at room temperature

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

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

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

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

Question 8 of 16

9. Describe the formation of a covalent bond

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

The sharing of a single electron between two nuclei

The sharing of a pair of electrons between two nuclei

The transfer of electrons from one atom to another

Question 9 of 16

10. State the particle that is found in the shells orbiting the nucleus

Protons and electrons

Protons

Electrons

Neutrons

Question 10 of 16

11. A gas is bubbled through limewater and the limewater goes cloudy. Identify the gas.

Hydrogen

Ammonia

Carbon dioxide

Oxygen

Question 11 of 16

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

They have the same number of electrons

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

They are all diatomic

They are all coloured gases

Question 12 of 16

13. What colour is hydrated copper (II) sulfate?

Purple

Blue

White

Cream

Question 13 of 16

14. Where are metals found on the periodic table?

On the left, reaching across the middle

Only on the bottom row

At the top right

Only in the left hand column

Question 14 of 16

15. What is meant by the term atom?

An atom is the smallest part of an element

An atom is made up of two or more elements bonded together

An atom is the smallest part of a compound

An atom is a particle found in the nucleus

Question 15 of 16

16. Why do elements in the same group of the periodic table have similar chemical properties?

Elements in the same group of the periodic table have the same number of electrons in their outer shell

Elements in the same group of the periodic table have the same number of protons

Elements in the same group of the periodic table are all the same type of element (metal, non-metal etc.)

Elements in the same group of the periodic table have different numbers of electrons in their outer shell

Question 16 of 16

Simple Molecules & Covalent Bonding quiz

Simple Molecules & Covalent Bonding quiz

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