Atomic Structure and Isotopes

Question 1

What is an Isotope?

Answer 1

Atoms of the same element with different numbers of neutrons and different masses (but same number of protons and electrons)

Question 2

What is an Ion?

Answer 2

An atom or molecule with a net electric charge to a loss/gain of one or more electrons

Question 3

What is the atomic number?

Answer 3

The number of protons in the nucleus of the atom

Question 4

What is the mass number?

Answer 4

The number of protons and neutrons in an atom

Question 5

What is the ionic charge?

Answer 5

The charge on an ion

Question 6

What is relative isotopic mass?

Answer 6

The mass compared with 1/12th mass of carbon-12

Question 7

What is relative atomic mass?

Answer 7

The weighted mean mass compared with 1/12th mass of carbon-12

Question 8

What is the equation for relative atomic mass?

Answer 8

the sum of the individual mass multiplied by their abundance

Question 9

What is relative molecular/formula mass?

Answer 9

The ratio of the average mass of one molecule of an element or compound to one twelfth of the mass of an atom of carbon-12