Simple Molecules & Covalent Bonding quiz

1. 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 electrons in the inner shell

Same electronic configuration

Same number of electron shells

same number of electrons in the outer shell

Question 1 of 16

2. What are the two parts of an atom?

The centre and the electron shells

The nucleus and the electron cloud

The outside and inside

The nucleus and the electron shells

Question 2 of 16

3. How many protons in a helium atom?

2

1

3

4

Question 3 of 16

4. How are elements arranged in the periodic table?

in order by atomic number

in order by size

in no particular order

in order by mass number

Question 4 of 16

5. Which group of atoms has a full outer shell?

Group 7, the halogens

Group 0, the noble gases

Group 1, the alkali metals

Group 2, alkaline earth metals

Question 5 of 16

6. In the dot and cross diagram of the outer electrons showing the covalent bonding in a molecule of hydrogen (H₂), how many electrons should be shown in areas 1, 2 and 3?

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

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

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

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

Question 6 of 16

7. 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 transfer of electrons from one atom to another

The sharing of a pair of electrons between two nuclei

Question 7 of 16

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

Blue

Purple

White

Cream

Question 8 of 16

9. In the test of a gas, a glowing splint relights. What is the gas?

Hydrogen

Oxygen

Chlorine

Carbon dioxide

Question 9 of 16

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

A pair of electrons is transferred from bromine to hydrogen

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

Question 10 of 16

11. How many electrons in the outer shell of group 4 elements?

0

3

4

5

Question 11 of 16

12. 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 fewer attractions between them. These take more energy to overcome.

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

Question 12 of 16

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

Isotopes have different masses

Isotopes have the same number of electrons

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

Isotopes are radioactive

Question 13 of 16

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

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

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

Question 14 of 16

15. What is meant by the term molecule?

A molecule contains at least three atoms

A molecule is found in the nucleus of an atom

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

A molecule is the smallest part of an element

Question 15 of 16

16. Where are non-metals found on the periodic table?

At the top right, plus hydrogen

Only on the bottom row

Only in the left hand column

On the left, reaching across the middle

Question 16 of 16

Simple Molecules & Covalent Bonding quiz

Simple Molecules & Covalent Bonding quiz

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