Atomic structure and isotopes

Question 1

What three sub-atomic particles are in an atom?

Answer 1

Protons, neutrons and electrons.

Question 2

What is the relative mass and relative charge of a proton?

Answer 2

The relative mass = 1 The relative charge= +1

Question 3

What is the relative mass and relative charge of a neutron?

Answer 3

The relative mass = 1 The relative charge= 0

Question 4

What is the relative mass and relative charge of an electron?

Answer 4

The relative mass = Almost 0 The relative charge= -1

Question 5

What happens if an atom loses one or more electrons?

Answer 5

It becomes a positively charged ion.

Question 6

What happens if an atom gains one or more electrons?

Answer 6

It becomes a negatively charged ion.

Question 7

What is the atomic number of an atom?

Answer 7

The number of protons and electrons an atom contains.

Question 8

What is the mass number of an atom?

Answer 8

The total number of neutrons and protons an atom contains.

Question 9

What is an isotope?

Answer 9

Isotopes are the atoms of an element with different numbers of neutrons. They have the same proton number, but different mass numbers.

Question 10

True or False

An isotope has the same number of protons as it does electrons.

Answer 10

True