chapter 3 - atomic structure

Question 1

what is the relative charge and mass of proton?

Answer 1

relative charge : +1 , relative mass : 1

Question 2

what is the relative charge and mass of neutrons?

Answer 2

relative charge : 0 , relative mass : 1

Question 3

what is the relative charge and mass of electrons?

Answer 3

relative charge : -1 , relative mass : 1/1840

Question 4

atoms are electrically neutral, this means that they have…
1. as many neutrons as they need
2. equal numbers of electrons and protons
3. equal numbers of neutrons and protons
4. more neutrons than protons or electrons

Answer 4

equal numbers of electrons and protons