Simple Molecules & Covalent Bonding quiz

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

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

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 1 of 16

2. Describe the formation of a covalent bond

The sharing of a pair of electrons between two nuclei

The transfer of electrons from one atom to another

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

The sharing of a single electron between two nuclei

Question 2 of 16

3. Describe the test for ammonia gas

Burns with a squeaky pop

Turns limewater cloudy

Turns damp red litmus paper blue

Relights a glowing splint

Question 3 of 16

4. Give the definition of a covalent bond

Strong electrostatic attraction between oppositely charged ions

Strong electrostatic attraction between a shared pair of electrons and a nucleus

Strong electrostatic attraction between a shared pair of electrons and two nuclei

Strong electrostatic attraction between a postive ion and a sea of delocalised positive ions

Question 4 of 16

5. 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 number of electrons in the outer shell

Same electronic configuration

Same number of electron shells

Question 5 of 16

6. 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 different numbers of electrons in their outer shell

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

Question 6 of 16

7.

Explain, in terms of the arrangement of electrons in its atoms, why neon is very unreactive

Neon is a noble gas

Neon has the same number of electrons and protons so it is unreactive

Neon has an even number of electrons so it does not need to form bonds

Neon has 8 electrons in the outer shell, so it is full. Therefore it does not easily gain or lose electrons

Question 7 of 16

8. Write the electronic configuration of potassium

2,8,8,1

8,8,3

2,8,9

2,8,8,2

Question 8 of 16

9. Which particle(s) in an atom has a negative charge?

Electron

Electrons and neutrons

Neutron

Proton

Question 9 of 16

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

2

5

4

3

Question 10 of 16

11. How many protons in a phosphorus atom?

16

8

31

15

Question 11 of 16

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

Top left corner

Left hand colunm

In the middle

Scattered across it

Question 12 of 16

13. 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 horizontal row of elements

A Group is a vertical column of similar elements

A Group is a collection of similar elements

Question 13 of 16

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

Cream

White

Blue

Purple

Question 14 of 16

15. 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 15 of 16

16. 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 16 of 16

Simple Molecules & Covalent Bonding quiz

Simple Molecules & Covalent Bonding quiz

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