mocks

Question 1

Why are ball and stick diagrams not realistic?

Answer 1

1) Atoms (or ions) are not really perfect spheres.
2) They don’t show the electrons.
3) The atoms are relatively far apart, whereas in reality they would be much closer.

Question 2

How many electrons are shared in each covalent bond?

Answer 2

2 electrons

Question 3

What do we mean by the ‘electronic structure’ or ‘electronic configuration’ of an atom?

Answer 3

Electronic structure’ or ‘electronic configuration’ refers to the arrangement of electrons within an atom, i.e. how many electrons are in each shell.

Question 4

Do non-metals normally become positive or negative ions?

Answer 4

Non-metals normally become negative ions.

Question 5

How does the pH differ between strong and weak acids

Answer 5

The strong acid will have a lower pH as it will more fully ionise/dissociate, and so release more H+ ions

Question 6

What are the 6 methods through which mixtures can be separated?

Answer 6

1) Filtration
2) Chromatography
3) Crystallisation
4) Evaporation
5) Simple distillation
6) Fractional distillation