Random questions fr

Question 1

Describe how the covalent bonds in the water molecule hold these atoms together.
(2 marks)

Answer 1

The electrons in the outermost shell are shared
This occurs between 1 oxygen atom and 2 hydrogen atoms

Question 2

Describe in terms of electrons, what happens when sodium and oxygen react to form sodium oxide.
(3 marks)

Answer 2

Electrons are transferred or move between the atoms
Electrons are transferred from sodium atoms to oxygen atoms
Sodium loses 1 electron, and oxygen gains 2 electrons

Question 3

Describe what is meant by the term ‘ionic bonding’.
(2 marks)

Answer 3

Ionic bonding is the electrostatic force of attraction
between ions that have opposite charges

Question 4

Explain why atoms within a metal have a strong bond.
(2 marks)

Answer 4

The electrostatic force of attraction exists between the delocalised electrons and the positive metal ions

Question 5

Explain why fluorine is more reactive than iodine.
(3 marks)

Answer 5

Fluorine has fewer shells
The fluorine nucleus has a greater attraction to the outer shell electrons
Fluorine atoms gain electrons more easily