Atomic Model

He found that electrons have specific amounts of energy and move in specific orbits around the nucleus, like planets orbiting the sun. 

• J.J. Thomson
• Ernest Rutherford
• Niels Bohr
• James Chadwick

He found the positively charged protons in the nucleus and said that electrons moved around the nucleus

• J.J. Thomson
• Ernest Rutherford
• Niels Bohr
• James Chadwick

Tags

NGSS.MS-PS1-1

He found that atoms have smaller parts and found negative electrons that he theorized were surrounded in a sphere of positive charges

• J.J. Thomson
• Ernest Rutherford
• Niels Bohr
• James Chadwick

Tags

NGSS.MS-PS1-1

An atom is electrically neutral because

• the numbers of protons and neutrons are equal.

• the numbers of protons and electrons are equal.

• neutrons balance the protons and electrons.

Who is the person credited with the formation of the "plum pudding" model?

• Thomson

• Rutherford

• Bohr

• Dalton

Tags

NGSS.MS-PS1-1

Where is number two pointing at?

• Nucleus

• Protons

• Neutrons

• Electron cloud

Tags

NGSS.MS-PS1-1

Where is number one pointing at?

• Nucleus

• Protons

• Neutrons

• Electron cloud

Tags

NGSS.MS-PS1-1

Which of the following statements are true about the electron cloud?

• It is neutrally charged

• It is negatively charged

• It is almost empty space

• It contains most of the mass of the atom

Tags

NGSS.MS-PS1-1

The smallest unit of an element that maintains the properties of that element

• proton

• atomic mass unit

• electron

• atom

A subatomic particle that has a positive charge and that is found in the nucleus of an atom

• proton

• neutron

• electron

• nucleus