P1.1 & P1.2 & P1.3

Question 1

What is the plum pudding model?

Answer 1

An atom where electrons are scattered unevenly with an elastic sphere surrounded by positive charge

Question 2

What did Ernest Rutherford discover?

Answer 2

He discovered that some materials emit particles, called alpha particles. He suggested that an atom was made up of a tiny, positively charged nucleus.

Question 3

What did Bohr discover?

Answer 3

In 1913, he refined Rutherfords idea by adding the electrons were in fixed orbits, called electron shells.

Question 4

What did Thompson discover?

Answer 4

Plum pudding model - he suggested that atoms contain electrons which are negatively charged and have an overall neutral charge because atoms do not have electric charge.

Question 5

What did Dalton discover?

Answer 5

Atoms were small and indestructible. He thought that all atoms in an element are the same but atoms from 1 element are different to other elements

Question 6

Conversion of 1°C to 1K

Answer 6

1°C + 273.15 =274.15 K
1°C = 274.15 K

Question 7

Specific heat capacity

Answer 7

The energy required to raise the temperature of 1kg of a substance of 1K.

Question 8

Conversion of 0K to 0°C

Answer 8

0K − 273.15 = -273.1°C

Question 9

Melting point of water

Answer 9

0°C

Question 10

Freezing point of water

Answer 10

0°C

Question 11

Boiling point of water

Answer 11

100°C