1.2- Fundamental Particles, Mass number and Atomic number

Question 1

Properties of protons electrons and neutrons

Answer 1

Question 2

Answer 2

mass number = A (protons + neutrons)

atomic number = Z (no. of protons)

Question 3

Ions

Answer 3

• have unequal number of protons and neutrons
  * Negative ions (anions)have more electrons than protons. For example, a particle with 1 proton and 2 electrons would be a negative ion with an overall charge of -1.
• Positive ions (cations)have fewer electrons than protons. For example, a particle with 3 protons and 2 electrons would be a positive ion with an overall charge of +1.

Question 4

What are protons and neutrons collectively known as?

Answer 4

nucleons