Atoms and the Periodic Table

Proton charge?

+

Electron charge?

-

Electron mass

0

Neutron mass

1

Proton mass

1

19 K 39.098

19- protons which means 19 electrons K - atomic symbol 39.098 - 39-19=20 neutrons

If you want to change to the charge of an atom you can either: Add a proton: Yes or no Add a neutron: Yes or no Add an electron: yes or no

Add a proton: Yes Add a neutron: No Add an electron: yes

If you want to change a type of element your atom is, you can either Add a proton: Yes or no Add a neutron: Yes or no Add an electron: yes or no

Add a proton: Yes Add a neutron: no Add an electron:no

If you want to change the mass of your atom you can either: Add a proton: Yes or no Add a neutron: Yes or no Add an electron: yes or no

Add a proton: Yes Add a neutron: Yes Add an electron: no

Niels Bohr

Agreed an atom had a nucleus surrounded by electrons

John dalton

All atoms of a certain element are identical. But eh form all other elements.

Neutron charge?

Neutral

Atomic number tells:

Number of protons

What determines the element?

Number of protons

K is an example of

Atomic symbol

JJ Thompson

Atoms are made of smaller particles- negative charge (electrons)

Number of electrons:

Atoms have no charge most of the time, which means that they have the same number of protons as the same number of electrons

What is an atom?

Atoms make up matter

Where is the electron located?

Cloud

Ernest Rutherford

Suggest atoms have a nucleus - made up of smaller parts (protons)

Unstable

Different protons and neutrons

James Chadwick

Discovered nucleus contains uncharged particles (neutrons)

Current atomic theory

Electrons move within area around nucleus called electron cloud

Stable

Even amount of protons and neutrons

What would give you a neutral atom?

Protons and electrons

What would increase the mass of an atom?

Protons and neutrons

Which is located in the nucleus?

Protons and neutrons

Parts of an atom?

Protons, neutrons, electrons

Atomic mass:

The number of protons and neutrons in the nucleus

Democritus

You could end up with a particle that could not be cut