chemistry

Mass of a proton

1

Charge of a proton

Positive

Where is a proton found

Center of the atom (nucleus)

Mass of a neutron

1

Charge of a nuetron

Nuetral

Where is a nucleus located

Nucleus +/ center of the atom

Mass of a electron

Almost 0

Charge of a electron

Negative

Where is the nucleus located

Shells, orbits the nucleus

How many electrons can be in the first shell

Up to 2

How many electrons can be in the 2nd shell

Up to 8

How many electrons in the 3rd shell

Up to 8

Who was dalton

Dalton said in 1800 that all matter was made of atoms, atoms cannot be created or destroyed, and there is no particles smaller than a atom. He though it looked like a smooth ball

Who was j.j Thompson

In 1904, Thompson said electrons exist and they have a negative charge and created the plum pudding model.

Who was Ernest Rutherford

1913, created the model alpha scattering, discovered the nucleus

Mass

Number of protons and neutrons together

Who created the periodic table

Mendelvee

Which scienctidt helped discover the atom

Rutherford, Bohr, Thomas