C2 Topic 3

Question 1

What is the relative mass of a proton?

Answer 1

1

Question 2

What is the relative mass of a neutron?

Answer 2

1

Question 3

What is the relative mass of an electron?

Answer 3

Very small

Question 4

Where can you find the atomic number of an element and what is it?

Answer 4

Top left corner of the element on the periodic table and it’s the total number of protons and neutrons in the elements nucleus

Question 5

Where can you find the mass number of an element and what is it?

Answer 5

Bottom left corner of the element on the periodic table and it is the number of protons (which equals the amount of electrons)

Question 6

How do you find the number of neutrons?

Answer 6

Number of neutrons = mass number - atomic number

Question 7

What is an isotope?

Answer 7

Isotopes are atoms of the same element with different numbers of neutrons

Question 8

How do you find out the Mr of a compound?

Answer 8

By adding up the relative atomic masses (Ar) of the elements in the compound.

Question 9

What is a mole?

Answer 9

One mole of any substance is its relative formula mass in grams

Question 10

What can you tell after balancing an equation?

Answer 10

Balanced equations tell us the number of moles involved in a chemical reaction and to calculate the masses of the reactants and the products in a chemical reaction