Bonding corrections Y9

Question 1

What is the definition of a:
molecule
Ion

Answer 1

two or more atoms that are chemically bonded

an electrically charged atom or group of atoms formed by the loss or gain of one or more electrons

Question 2

What is the definition of a
Covalent bond
Ionic bond

Answer 2

The electrostatic attraction between the positive nucleus and the shared pair of negative electrons
When a positively charged ion forms a bond with a negatively charged ion and one atom transfers electrons to another.

Question 3

Explain how the covalent bonds in the water molecule hold the hydrogen and oxygen atoms together

Answer 3

There are electrostatic forces of attraction between a shared pair of electrons in the adjacent nuclei.

Question 4

Sodium oxide NA2O is an ionic compound when sodium reacts with oxygen
Explain how the bonds in sodium oxide to hold the compound together

Answer 4

1. They have oppositely charged ions

2. Both of their outer shells are full

Question 5

Which ion does aluminium form when it forms an ionic compound with a non-metal? Explain why aluminium forms this ion

Answer 5

1. Forms an ion with a 3+ charge because it’s a metal and
2. Has to loose 3 negative electrons
3. Which becomes an ion with a full outer shell