Atomic Structure

Question 1

Who discovered everything is made up of atoms?

Answer 1

Dalton

Question 2

Who made the plum pudding model of an atom?

Answer 2

J.J Thomson

Question 3

Whose model has negative electrons orbiting a positive nucleus?

Answer 3

Rutherford

Question 4

Who discovered the neutron?

Answer 4

Chadwick

Question 5

What is the atomic number?

Answer 5

The number of protons in an atom

Question 6

What is the mass number?

Answer 6

The total number of protons and neutrons in an atom

Question 7

How are electrons arranged?

Answer 7

In shells orbiting the nucleus

Question 8

Which shells do electrons fill up first?

Answer 8

The shells closest to the nucleus

Question 9

What is the relative mass of a proton?

Answer 9

1

Question 10

What is the relative mass of a neutron?

Answer 10

1

Question 11

What is the relative mass of a electron?

Answer 11

1/1840

Question 12

What is the relative charge of a proton?

Answer 12

+1

Question 13

What is the charge of a neutron?

Answer 13

0

Question 14

What is the charge of an electron?

Answer 14

-1

Question 15

What is an isotope?

Answer 15

They are ions of the same element so they have the same number of protons but a different mass number

Question 16

How do you calculate the relative atomic mass?

Answer 16

(% x no. of neutrons) + (% x no. of neutrons)/100