Simple Molecules & Covalent Bonding quiz

1. What is meant by the term molecule?

A molecule is the smallest part of an element

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

A molecule is found in the nucleus of an atom

A molecule contains at least three atoms

Question 1 of 16

2. 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 electronic configuration

Same number of electrons in the inner shell

same number of electrons in the outer shell

Same number of electron shells

Question 2 of 16

3. 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 have different numbers of electrons in their outer shell

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 3 of 16

4. Describe the test for carbon dioxide gas

Turns damp red litmus paper blue

Turns moist litmus paper white (bleaches)

Relights a glowing splint

Bubble the gas through limewater and see if it goes cloudy

Question 4 of 16

5. On the Periodic table what is the meaning of the word Group?

A Group is a vertical column of similar elements

A Group is collection of elements with the same number of electron shells

A Group is a collection of similar elements

A Group is a horizontal row of elements

Question 5 of 16

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

A shared pair of electrons is attracted to 2 nuclei

A shared pair of electrons is attracted to one nucleus

A pair of electrons is transferred from bromine to hydrogen

A single electron is transferred from bromine to hydrogen

Question 6 of 16

7. 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 more energy to overcome.

Larger molecules have more attractions between them. These take less 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 7 of 16

8. In the dot and cross diagram of the outer electrons showing the covalent bonding in a molecule of ethane (C₂H₆), how many electrons should be shown in areas 1, 2, 3, 4, 5, 6 and 7?

There should be two electrons in each of areas 1, 2, 3, 4, 5, 6 and 7

There should be two electrons in each of areas 1, 2, 3, 4, 5, 6 and 7, and also two more on the outside of each hydrogen atom

There should be two electrons in each of areas 1, 3, 4, 5, 6 and 7, but none in area 2

There should be two electrons in each of areas 1, 2, 3, 4, 5, 6 and 7, and also seven more on the outside of each hydrogen atom

Question 8 of 16

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

Purple

Blue

White

Cream

Question 9 of 16

10. What is the atomic number of a carbon atom?

7

12

13

6

Question 10 of 16

11. 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 11 of 16

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

Question 12 of 16

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

Only on the bottom row

At the top right, plus hydrogen

On the left, reaching across the middle

Only in the left hand column

Question 13 of 16

14.

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

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

Neon is a noble gas

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 14 of 16

15. How many electrons in the outer shell of group 2 elements?

1

2

3

0

Question 15 of 16

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

Electrons and neutrons

Electron

Proton

Neutron

Question 16 of 16

Simple Molecules & Covalent Bonding quiz

Simple Molecules & Covalent Bonding quiz

Related Posts:

Share This Story, Choose Your Platform!