1.7 Ions, Atoms And Isotopes

Question 1

What happens if an atom loses or gains an electron?

Answer 1

If an atom gains an electron it forms a negative ion. If an atom loses an electron it forms a positive ion

Question 2

How can you represent the atomic number and mass number of an atom?

Answer 2

By using the notation 12/24 Mg where magnesiums atomic number is 12 and its mass number is 24

Question 3

What is an isotope?

Answer 3

Isotopes are atoms of the same element with different numbers of neutrons. They have identical chemical properties but their physical properties ,such as density, can differ.