Atoms

Question 1

What is an atom?

Answer 1

The smallest part of an element that can exist.

Question 2

What is Dalton’s model of the atom?

Answer 2

Atoms as a solid Spheres that could not be divided into smaller parts.

Question 3

What is the plum pudding model of the atom?

Answer 3

Sphere of positive charge with negative electrons embedded in it.

Question 4

What do scientists discover in the alpha scattering experiment?

Answer 4

Some alpha particles were deflected by the Gold foil - this showed that an atom’s mass and positive charge must be concentrated in one small space (the nucleus)

Question 5

Describe the nuclear model of an atom?

Answer 5

Dense nucleus with electrons orbiting it.

Question 6

What did Neil’s Bohr discover?

Answer 6

Uncharged particle called a neutron.

Question 7

What did James Chadwick discover?

Answer 7

Uncharged particle called the neutron.

Question 8

Where are protons and neutrons?

Answer 8

In the nucleus.

Question 9

What is the relative mass of each sub - atomic particle?

Answer 9

Proton: +1, neutron: 0, electron: -1.

Question 10

What is the relative charge of each sub - atomic particle?

Answer 10

proton: +1, neutron: 0, electron: -1