AP Chemistry Exam Review

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

• Products

• Reactants

• Subscripts

• Coefficients

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-2

What is the atomic number of this atom?

• 4

• 5

• 9

• none of the above

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.

How many total atoms are in the product?

• 10

• 5

• 7

• 12

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-5

How many oxygen atoms are in this chemical formula?

• 6 oxygen atoms

• 2 oxygen atoms

• 3 oxygen atoms

• 4 oxygen atoms

Tags

NGSS.MS-PS1-1

Which of the following is described as the basic unit of matter?

• Element

• Atom

• Molecule

• Compound

In the atom diagram shown, E is pointing to

• An electron

• a proton

• a neutron

• the nucleus

Tags

NGSS.MS-PS1-1

B and C are found in the ______ of an atom.

• electron cloud

• Space

• Nucleus

• Outside

Tags

NGSS.MS-PS1-1

What is the atomic mass of this atom?

• 1

• 3

• 4

• 7

Tags

NGSS.MS-PS1-1

Using the information provided, determine how many electrons the a Boron atom contains.

• 2.5

• 5

• 6

• 10.81

Tags

NGSS.MS-PS1-1