Unit 2A Review

Substances formed from atoms of two or more elements are called

• mixtures

• compounds

• colloids

• elements

What subatomic particles would you find in the nucleus of an atom?

• Protons only
• Protons and Neutrons
• Neutrons and Electrons
• Protons and Electrons 

Tags

NGSS.HS-PS1-8

What subatomic particle is electrically neutral (no charge)?

• Proton
• Ion
• Neutron
• Electron

Tags

NGSS.MS-PS1-1

What subatomic particle(s) would be found orbiting the nucleus?

• Neutrons only
• Electrons only
• Protons and Neutrons
• Protons and Electrons

Tags

NGSS.MS-PS1-1

The first energy level can hold up to how many electrons?

• 8
• 4
• 2
• 5

Tags

NGSS.MS-PS1-1

an atom with atomic number 6 would have how many protons 

• 6
• 12
• 3
• cannot be determined 

How many protons does this atom have?

• 2.5
• 6
• 5
• 10.811

Tags

NGSS.HS-PS1-1

What is a valence electron?

• an electron that is found in the outermost shell of an atom. 
• an electron found in the innermost shell of an atom.
• an electron found in the middle shell.

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

An atom that gains or loses an electron becomes

• an isotope

• a new element

• an ion

• a molecule

How many total atoms are in C₆H₁₂0₆

• 3

• 6

• 12

• 24

Tags

NGSS.MS-PS1-1