Simple Molecules & Covalent Bonding quiz

1. How many electrons in the outer shell of group 4 elements?

5

0

4

3

Question 1 of 16

2. Which particle(s) in an atom has a positive charge?

Electron

Protons and electrons

proton

Neutron

Question 2 of 16

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

In the middle

Scattered across it

Left hand colunm

Top left corner

Question 3 of 16

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

A Group is a collection of similar elements

A Group is a horizontal row of elements

A Group is a vertical column of similar elements

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

Question 4 of 16

5. 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 one nucleus

A shared pair of electrons is attracted to 2 nuclei

A pair of electrons is transferred from bromine to hydrogen

Question 5 of 16

6. 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 more energy to overcome.

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

Question 6 of 16

7. Explain, in terms of electrons, why isotopes have the same chemical properties

Isotopes have different masses

Isotopes have the same number of protons but a different number of neutrons

Isotopes have the same number of electrons

Isotopes are radioactive

Question 7 of 16

8. Describe the chemical test for water

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

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

Question 8 of 16

9. 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 single electron between two nuclei

The sharing of a pair of electrons between two nuclei

Question 9 of 16

10. 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 10 of 16

11. In the test of a gas, a glowing splint relights. What is the gas?

Oxygen

Carbon dioxide

Chlorine

Hydrogen

Question 11 of 16

12. 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 number of electrons in the outer shell

Same electronic configuration

Same number of electrons in the inner shell

same number of electron shells

Question 12 of 16

13.

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 has 8 electrons in the outer shell, so it is full. Therefore it does not easily gain or lose electrons

Neon has an even number of electrons so it does not need to form bonds

Neon is a noble gas

Question 13 of 16

14. What is meant by the term molecule?

A molecule is found in the nucleus of an atom

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 the smallest part of an element

Question 14 of 16

15. What is the atomic number of a beryllium atom?

8

9

5

4

Question 15 of 16

16. 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 16 of 16

Simple Molecules & Covalent Bonding quiz

Simple Molecules & Covalent Bonding quiz

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