The Atom

Question 1

What is the definition of Atomic Number?

Answer 1

The number of protons in the nucleus of an atom

Question 2

Name the three types of particle found in an atom

Answer 2

Electrons
Protons
Neutrons

Question 3

Give the relative masses of these three particles

Answer 3

Electrons - 1/2000
Protons - 1
Neutrons - 1

Question 4

Give the relative charges of these three particles

Answer 4

Proton - +1
Neutron - 0
Electron - -1

Question 5

State where in the atom these three particles can be found

Answer 5

Protons and Neutrons - nucleus

Electrons - in the orbitals

Question 6

How can you work out the number of neutrons an atom has?

Answer 6

By subtracting the atomic number from the mass number

Question 7

What are isotopes?

Answer 7

Atoms with the same number of protons but a different number of neutrons

Question 8

Why do isotopes have the same chemical properties?

Answer 8

Chemical properties are determined by the electrical configuration, isotopes have the same amount of electrons

Question 9

Why do isotopes have different physical properties?

Answer 9

They are dependent on the mass, isotopes have different masses

Question 10

What is the definition of Mass Number?

Answer 10

The total number of protons and neutrons in the nucleus of an atom