Atomic Structure

Known for his Atomic Theory. This theory states that all matter is composed of extremely small particles.

• Dalton

• Thomas

• Rutherford

• Bohr

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-5

Discovered the electron using the cathode-ray tube. It is known as the plum pudding "chocolate chip cookie model"

• Dalton

• Thomas

• Rutherford

• Bohr

Discovered the proton using the gold foil experiment. He proposed a model of an atom that had a nucleus a positive charge surrounded by a large area of empty space where electrons orbited.

• Dalton

• Thomas

• Rutherford

• Bohr

Tags

NGSS.HS-PS1-8

Made Daltons model invalid. Protons occupy a dense central region called the nucleus. Electrons orbit the nucleus much like planets orbiting the sun.

• Dalton

• Thomas

• Rutherford

• Bohr

Tags

NGSS.HS-PS1-8

Discovered the neutron. He concluded the nucleus also contains a particle that has equal mass to the proton. But unlike the proton, its electrically neutral.

• Chadwick

• L. De Brogile

• Schrodinger

• Bohr

Tags

NGSS.HS-PS1-8

Discovered the wave nature of electrons and suggested that all matter have wave properties.

• Chadwick

• L. De Brogile

• Schrodinger

• Bohr

Tags

NGSS.HS-PS4-3

Discovered Quantum Numbers that describe the probability of electrons location at a certain time.

• Chadwick

• L. De Brogile

• Schrodinger

• Bohr

What is the mass number

• Number of protons + Numbers of Neutrons,

• Number of Neutrons + Number of electrons

• Number of Protons

• Number of Neutrons

Tags

NGSS.MS-PS1-1

What is the Atomic Number

• Number of protons + Numbers of Neutrons,

• Number of Neutrons + Number of electrons

• Number of Protons

• Number of Neutrons

Has a negative charge and its particles can move freely.

• Electron

• Proton

• Neutron

Tags

NGSS.HS-PS1-3