Simple Molecules & Covalent Bonding quiz

1. How many electrons in the outer shell of group 2 elements?

2

3

1

0

Question 1 of 16

2. 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 electron shells

same number of electrons in the outer shell

Same number of electrons in the inner shell

Same electronic configuration

Question 2 of 16

3. On the Periodic Table what is the meaning of the word Period?

A Period is a vertical column of similar elements

A Period is a collection of similar elements

A Period is a collection of elements with the same number of electrons in the outer shell

A Period is a horizontal row of elements

Question 3 of 16

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

Scattered across it

In the middle

Top left corner

Left hand colunm

Question 4 of 16

5. Which gas will bleach moist litmus paper?

Ammonia

Hydrogen

Chlorine

Carbon dioxide

Question 5 of 16

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

Cream

White

Purple

Blue

Question 6 of 16

7. Why is the melting point of a smaller molecule lower than that of a larger 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 7 of 16

8. 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 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 the same number of electrons in their outer shell

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

Question 8 of 16

9. How many protons in a helium atom?

1

2

3

4

Question 9 of 16

10. In the dot and cross diagram of the outer electrons showing the covalent bonding in a molecule of nitrogen (N₂), how many electrons should be shown in areas 1, 2 and 3?

There should be three electrons in area 1, four electrons in area 2, and three electrons in area 3

There should be four electrons in area 1, two electrons in area 2, and four electrons in area 3

There should be two electrons in area 1, six electrons in area 2, and two electrons in area 3

There should be two electrons in area 1, four electrons in area 2, and two electrons in area 3

Question 10 of 16

11. Describe the formation of a covalent bond

The sharing of a single electron between two nuclei

The transfer of electrons from one atom to another

The sharing of a pair of electrons between two nuclei

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

Question 11 of 16

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

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

They are all diatomic

They are all coloured gases

They have the same number of electrons

Question 12 of 16

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

A shared pair of electrons is attracted to one nucleus

A shared pair of electrons is attracted to 2 nuclei

A single electron is transferred from bromine to hydrogen

A pair of electrons is transferred from bromine to hydrogen

Question 13 of 16

14. State the mass and charge of a neutron

Neutron: mass=negligible, charge =-1

Neutron: mass=1, charge =-1

Neutron: mass=1, charge =+1

Neutron: mass=1, charge =0

Question 14 of 16

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

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

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 weak intermolecular forces that require little energy to overcome

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

Question 15 of 16

16. What is meant by the term molecule?

A molecule is the smallest part of an element

A molecule contains at least three atoms

A molecule is made of a fixed number of two or more atoms covalently bonded together

A molecule is found in the nucleus of an atom

Question 16 of 16

Simple Molecules & Covalent Bonding quiz

Simple Molecules & Covalent Bonding quiz

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