Atoms

Question 1

Atom

Answer 1

The smallest particle of a chemical element that can exist

Question 2

Electron

Answer 2

• Orbits the nucleus of the atom
• has a negative charge
• has a RAM of 1/2000

Question 3

Proton

Answer 3

Part of the nucleus of the atom and has a positive charge

Question 4

Neutron

Answer 4

Part of the atom in the nucleus and has a neutral charge

Question 5

Greeks

Answer 5

Discovered that elements couldn’t be broken down any more

Question 6

John Dalton

Answer 6

Theorised that atoms were small spheres

Question 7

JJ Thompson

Answer 7

Created the plum pudding model

- positive dough with negative currant

Question 8

Rutheford

Answer 8

Discovered that most of the atom is empty space

Few alpha particles bounced back

Question 9

Bohr

Answer 9

Came up with the planetarium model of the atom

-electron orbit the nucleus like the sun

Question 10

James Chadwick

Answer 10

Discovered the neutron

Official model of the atom

Question 11

How do you work out the number of neutrons?

Answer 11

Mass num.-atomic num.

Question 12

Reactivity

Answer 12

Groups 1+2 get more reactive going down

Groups 6+7 get more reactive going up