Simple Molecules & Covalent Bonding quiz

1. Explain why atoms are neutral

The numbers of electrons and protons are equal

The numbers of electrons and neutrons are equal

The numbers of protons and neutrons are equal

The number of electrons is even

Question 1 of 16

2. In the dot and cross diagram of the outer electrons showing the covalent bonding in a molecule of methane (CH₄), how many electrons should be shown in areas 1, 2, 3, and 4?

There should be one electron in each of the areas 1, 2, 3 and 4

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

There should be two electrons in each of the areas 1, 2, 3 and 4, and an additional 6 electrons around the outside of each hydrogen atom

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

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 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

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

Question 3 of 16

4. What are the elements in group 0 called?

Halogens

Noble gases

Light gases

Alkali metals

Question 4 of 16

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

A shared pair of electrons is attracted to one nucleus

A shared pair of electrons is attracted to 2 nuclei

A pair of electrons is transferred from bromine to hydrogen

A single electron is transferred from bromine to hydrogen

Question 5 of 16

6. On the Periodic Table what is the meaning of the word Period?

A Period is a collection of similar elements

A Period is a collection of elements with the same number of electrons in the outer shell

A Period is a vertical column of similar elements

A Period is a horizontal row of elements

Question 6 of 16

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

Cream

Purple

White

Blue

Question 7 of 16

8. Where are metals found on the periodic table?

On the left, reaching across the middle

Only in the left hand column

At the top right

Only on the bottom row

Question 8 of 16

9. If a substance has a simple molecular structure, what physical state might it be at room temperature?

Gas or liquid

Solid

Solid or liquid

Any state

Question 9 of 16

10. What is meant by the term atom?

An atom is the smallest part of a compound

An atom is the smallest part of an element

An atom is a particle found in the nucleus

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

Question 10 of 16

11. How many electrons in an argon atom?

40

19

17

18

Question 11 of 16

12. Describe the formation of a covalent bond

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

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

Question 12 of 16

13. 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 electronic configuration

Same number of electron shells

same number of electrons in the outer shell

Question 13 of 16

14. How many protons in a silicon atom?

27

14

28

29

Question 14 of 16

15. Describe the test for hydrogen gas

Turns damp red litmus paper blue

Relights a glowing splint

Turns moist litmus paper white (bleaches)

Use a lit splint to see if the gas pops

Question 15 of 16

16. 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 fewer attractions between them. These take less 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 more energy to overcome.

Question 16 of 16

Simple Molecules & Covalent Bonding quiz

Simple Molecules & Covalent Bonding quiz

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