The number of protons in an atom is known as the ____________ of that atom.

• atomic mass

• atomic number

A(n) ___________ is an atom of the same element but with a different mass.

• ion

• isotope

• atom

• electron

Ernest Rutherford discovered the ______________ by shooting alpha particles at thin piece of gold foil.

• electron

• plum pudding

• nucleus

• electron cloud

A scientist named __________________ discovered the electron and thought that the atomic model looked something like 'plum pudding.'

• J.J Thomson

• Ernest Rutherford

• Niels Bohr

• Erwin Schrodinger

Chlorine-35 has how many neutrons?

• 18

• 17

• 16

• 7

Tags

NGSS.MS-PS1-1

Which family of elements does not form bonds?

• Halogens

• Alkaline Earth Metals

• Noble Gases

• Transition Metals

The ______________________explains how atoms share electrons in covalent bonding.

• octet rule

• Aufbau Principle

• exclusion principle

• cell theory

Ionic bonds are between ______________ and __________________.

• metals, metals

• non-metals, non-metals

• metals, non-metals

• molecules, transition metals

Tags

NGSS.HS-PS1-1

NGSS.HS-PS2-4

Covalent bonds occur when electrons are _____________ between atoms.

• transferred

• shared

• destroyed

• formed

Tags

NGSS.HS-PS1-1

Which of the following is NOT an example of an intensive property.

• mass

• color

• boiling point

• density