Simple Molecules & Covalent Bonding quiz

1. State the particle that is found in the shells orbiting the nucleus

Protons and electrons

Neutrons

Electrons

Protons

Question 1 of 16

2. 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 contains at least three atoms

A molecule is found in the nucleus of an atom

Question 2 of 16

3. Where are metals found on the periodic table?

Only in the left hand column

Only on the bottom row

At the top right

On the left, reaching across the middle

Question 3 of 16

4. Describe the test for carbon dioxide gas

Relights a glowing splint

Bubble the gas through limewater and see if it goes cloudy

Turns damp red litmus paper blue

Turns moist litmus paper white (bleaches)

Question 4 of 16

5. In the dot and cross diagram of the outer electrons showing the covalent bonding of carbon dioxide (CO₂), how many electrons should be shown in areas 1, 2, 3 and 4?

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

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

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

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

Question 5 of 16

6. 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 outer shell

Same number of electrons in the inner shell

Same number of electron shells

Same electronic configuration

Question 6 of 16

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

A single electron is transferred from bromine to hydrogen

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

Question 7 of 16

8. How many electrons in a nitrogen atom?

6

8

14

7

Question 8 of 16

9. How many neutrons in a typical atom of magnesium?

13

12

24

11

Question 9 of 16

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

A Period is a vertical column of similar elements

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

A Period is a horizontal row of elements

A Period is a collection of similar elements

Question 10 of 16

11. Describe the formation of a covalent bond

The sharing of a pair of electrons between two nuclei

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

The sharing of a single electron between two nuclei

The transfer of electrons from one atom to another

Question 11 of 16

12. What are the elements in group 0 called?

Light gases

Alkali metals

Noble gases

Halogens

Question 12 of 16

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

Purple

Blue

Cream

White

Question 13 of 16

14. Why is the boiling point of a larger molecule higher than that of a smaller 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 more attractions between them. These take more energy to overcome.

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

Question 14 of 16

15. 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 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

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.)

Question 15 of 16

16. 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 16 of 16

Simple Molecules & Covalent Bonding quiz

Simple Molecules & Covalent Bonding quiz

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