Simple Molecules & Covalent Bonding quiz

1. 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 more energy to overcome.

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

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.

Question 1 of 16

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

In the middle

Top left corner

Left hand colunm

Scattered across it

Question 2 of 16

3. How many electrons in a chlorine atom?

35.5

19

18

17

Question 3 of 16

4. Describe the formation of a covalent bond

The transfer of electrons from one atom to another

The sharing of a pair of electrons between two nuclei

The sharing of a single electron between two nuclei

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

Question 4 of 16

5. What is an atomic number?

The atomic number is the number of protons in an atom

The atomic number is the number of protons and neutrons in an atom

The atomic number is the number of neutrons in an atom

The atomic number is the number of protons, neutrons and electrons in an atom

Question 5 of 16

6. Describe the chemical test for water

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

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

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

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

Question 6 of 16

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

2

3

4

5

Question 7 of 16

8. 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 8 of 16

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

Group 2, alkaline earth metals

Group 1, the alkali metals

Group 7, the halogens

Group 0, the noble gases

Question 9 of 16

10. In the dot and cross diagram of the outer electrons showing the covalent bonding in a molecule of water (H₂O), how many electrons should be shown in areas 1, 2, 3 and 4?

There should be two electrons in each of areas 1 and 2, and two electrons in each of areas 3 and 4.

There should be two electrons in each of areas 1 and 2, and zero electrons in areas 3 and 4.

There should be four electrons in each of areas 1 and 2, and zero electrons in areas 3 and 4.

There should be two electrons in each of areas 1 and 2, and zero electrons in areas 3 and 4. There should also be an additional 4 electrons around the outside of the oxygen atom.

Question 10 of 16

11. 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 11 of 16

12. Describe the test for oxygen gas

Use a glowing splint and see if it relights

Bubble the gas through limewater and see if it goes cloudy

Use a lit splint to see if the gas pops

Turns moist litmus paper white (bleaches)

Question 12 of 16

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

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

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

Question 13 of 16

14. 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 electronic configuration

same number of electron shells

Same number of electrons in the inner shell

same number of electrons in the outer shell

Question 14 of 16

15. State the mass and charge of a neutron

Neutron: mass=1, charge =0

Neutron: mass=1, charge =-1

Neutron: mass=1, charge =+1

Neutron: mass=negligible, charge =-1

Question 15 of 16

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

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

A pair of electrons is transferred from bromine to hydrogen

Question 16 of 16

Simple Molecules & Covalent Bonding quiz

Simple Molecules & Covalent Bonding quiz

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