Simple Molecules & Covalent Bonding quiz

1. How many protons in a helium atom?

2

1

4

3

Question 1 of 16

2. 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 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 elements with the same number of electrons in the outer shell

A Period is a collection of similar elements

A Period is a horizontal row of elements

Question 3 of 16

4. 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 different numbers 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 the same number of electrons in their outer shell

Question 4 of 16

5. In the dot and cross diagram of the outer electrons showing the covalent bonding in a molecule of chlorine (Cl₂), how many electrons should be shown in areas 1, 2 and 3?

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

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

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

There should be four electrons in area 2 and three in each of areas 1 and 3

Question 5 of 16

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

Only on the bottom row

At the top right, plus hydrogen

Only in the left hand column

On the left, reaching across the middle

Question 6 of 16

7. Which particle(s) in an atom has a positive charge?

proton

Protons and electrons

Electron

Neutron

Question 7 of 16

8. Why is the melting point of a smaller molecule lower than that of a larger molecule?

Larger molecules have more 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 less energy to overcome.

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

Question 8 of 16

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

White

Purple

Blue

Cream

Question 9 of 16

10. Write the electronic configuration of argon

2,8,8

8,8,2

8,8,8

2,8,6

Question 10 of 16

11. What is meant by the term atom?

An atom is a particle found in the nucleus

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

An atom is the smallest part of an element

An atom is the smallest part of a compound

Question 11 of 16

12. Describe the test for hydrogen gas

Use a lit splint to see if the gas pops

Relights a glowing splint

Turns damp red litmus paper blue

Turns moist litmus paper white (bleaches)

Question 12 of 16

13. 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 electron shells

Same electronic configuration

Same number of electrons in the inner shell

Question 13 of 16

14. 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 giant covalent structure with many strong covalent bonds which require a lot of 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 weak covalent bonds which require little energy to overcome

Question 14 of 16

15. 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 one nucleus

A shared pair of electrons is attracted to 2 nuclei

Question 15 of 16

16. 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 16 of 16

Simple Molecules & Covalent Bonding quiz

Simple Molecules & Covalent Bonding quiz

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