Chemistry Review

What charge does an electron have?

• Negative
• Positive
• Neutral
• Contrated

Tags

NGSS.MS-PS1-1

NGSS.MS-PS2-3

Which of the following is found in the nucleus of an atom?

• electrons
• neutrons
• The center of an atom, composed of protons and neutrons
• molecules

In this chemical equation, the elements in red are the_______.

• Products

• Reactants

• Subscripts

• Coefficients

Tags

NGSS.MS-PS1-1

What is the atomic number of this atom?

• 4
• 5
• 9
• none of the above

Tags

NGSS.MS-PS1-1

What is the atomic mass of this atom?

• 1

• 3

• 4

• 7

Tags

NGSS.MS-PS1-1

What is a valence electron?

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

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

How many protons does this atom have?

• 2.5
• 6
• 5
• 10.811

Tags

NGSS.MS-PS1-1

How many molecules are in this formula?

• 1

• 2

• 3

• 6

What is the atomic mass for this element?

• 6

• 12.0107

• 6.0107

• 18.0107

Tags

NGSS.MS-PS1-1

How many neutrons are in an Calcium atom?

• 20

• 40.08

• 60

Tags

NGSS.MS-PS1-1