Atoms- atomic structure

Question 1

What are the three sub-atomic particles?

Answer 1

protons, neutrons and electrons

Question 2

What is relative charge of a particle?

Answer 2

the charge of the particle divided by the charge of a proton

Question 3

What is the relative charge of a proton?

Answer 3

1

Question 4

What is the relative charge of a neutron?

Answer 4

0

Question 5

What is the relative charge of an electron?

Answer 5

-1

Question 6

What is the relative mass?

Answer 6

the average mass of particles in an atom

Question 7

What is the relative mass of a proton?

Answer 7

1

Question 8

What is the relative mass of a neutron?

Answer 8

1

Question 9

What is the relative mass of an electron?

Answer 9

0

Question 10

how many electrons can the inner shell hold?

Answer 10

2

Question 11

how many electrons can the outer shells hold?

Answer 11

8

Question 12

What does the nucleus contain?

Answer 12

protons and neutrons

Question 13

What is the largest number in an element called?

Answer 13

the relative atomic mass (mass number)

Question 14

What is the smallest number in an element called?

Answer 14

the atomic mass (atomic number)

Question 15

How do we know how many protons and electrons there are in an atom of an element?

Answer 15

the atomic number

Question 16

How do we know how many neutrons there are in an atom?

Answer 16

mass number - atomic number

Question 17

Why do the number of protons and electrons stay the same but the number of neutrons can be different?

Answer 17

because the protons have a positive charge and the electrons have a negative charge, so they need to be to be balanced