science

Matter

Is composed of atoms

Atoms

Consist of central dense nucleus

Nucleus

Is made up of positively charged particles

Electron

Are the smallest and lightest of the particles

Protons

Are much larger and heavier than electrons

Neutron

Is one of the constituent particle of every atomic nucleus

James chadwick

Nucleus was discovered by

Rutherford atomic model

Was proposed by 1911 by ernest rutherford

Ernest Rutherford

Who created the Rutherford atomic model

Niehl bohr

Was a danish scientist

2

How many electrons are in the first first shell

8

How many electrons are in the second shell

18

How many electrons are in the third shell

Molecule

A define group of atoms

Structural formula

Is a chemical formula which shows how atoms were bonded

Atoms

Are made up three particles

Bohr model

Is a planatery model is similar to the planets orbiting the sun