Exam Q 16

Question 1

Define atomic number

Answer 1

The atomic number of an atom is the number of protons in the nucleus of that atom

Question 2

Define relative atomic mass (4)

Answer 2

It is defined as:
1. The average of the mass numbers of the isotopes of the element,

2. as they occur naturally.
3. Taking in their abundances into account and
4. expressed on a scale in which the atoms of the carbon-12 isotope have a mass of exactly 12 units.