Simple Molecules & Covalent Bonding quiz

1. Explain why nitrogen gas, N₂, is a gas at room temperature

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

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

Question 1 of 16

2. 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 more energy to overcome.

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

Question 2 of 16

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

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

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

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

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

Question 3 of 16

4. Describe the formation of a covalent bond

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 pair of electrons between two nuclei

The sharing of a single electron between two nuclei

Question 4 of 16

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

Scattered across it

Left hand colunm

Top left corner

In the middle

Question 5 of 16

6. What is the relative atomic mass (Aᵣ) of a silicon atom?

15

28

14

29

Question 6 of 16

7. 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 number of electrons in the inner shell

same number of electrons in the outer shell

Same electronic configuration

Question 7 of 16

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

Group 1, the alkali metals

Group 2, alkaline earth metals

Group 7, the halogens

Group 0, the noble gases

Question 8 of 16

9. Describe the chemical test for water

Add it to anhydrous copper(II) sulfate which will change from white to blue if water is present

Find the melting point. If it is 0 ⁰C then water is present

Find the boiling point. If it is 100 ⁰C water is present

Add it to anhydrous potassium permanganate which will turn from white to purple if water is present

Question 9 of 16

10. 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 10 of 16

11. In the test of a gas, a lit splint gives a squeaky pop. What is the gas?

Carbon dioxide

Oxygen

Hydrogen

Chlorine

Question 11 of 16

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

3

4

2

5

Question 12 of 16

13. Which particle(s) in an atom has the smallest mass?

Electron

Neutron

Proton

Electrons and neutrons

Question 13 of 16

14. How many electrons in the outer shell of group 3 elements?

1

3

0

2

Question 14 of 16

15. How are elements arranged in the periodic table?

in order by size

in order by mass number

in order by atomic number

in no particular order

Question 15 of 16

16. Give the definition of a covalent bond

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

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

Strong electrostatic attraction between oppositely charged ions

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

Question 16 of 16

Simple Molecules & Covalent Bonding quiz

Simple Molecules & Covalent Bonding quiz

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