AP Chemistry Review

What is the molecular formula if the empirical formula is CH₂O and the molecular molar mass is 180.18?

• CH₂O

• C₂H₄O₂

• C₄H₈O₄

• C₆H₁₂O₆

Tags

NGSS.MS-PS1-1

EF = CF₂ 
Molecular formula mass = 192
MF =

• C₄F₈

• C₄F

• CF₈

• C₂F₄

Tags

NGSS.MS-PS1-1

What is the charge of a proton?

• Negative

• Positive

• Neutral

What is the center of an atom containing protons and neutrons?

• nucleus

• neutron

• proton

• electron cloud

In order for an atom to be neutral what has to be true?

• The atom has more protons than neutrons

• The atom has more neutrons than protons

• The atom has the same number of protons and neutrons

• The atom has the same number of protons and electrons

What is the mass number?

• the number of protons in the nucleus

• the number of protons and neutrons in the nucleus

• the number of neutrons in the nucleus

• the number of protons and electrons in the atom

What is the atomic number?

• the number of protons in the nucleus

• the number of protons and neutrons in the nucleus

• the number of neutrons in the nucleus

• the number of protons in the energy levels

An atom has 10 protons, 15 neutrons and 10 electrons what is its mass number.

• 20

• 10

• 35

• 25

How many electrons are found in a neutral atom of chlorine ?

• 35

• 11

• 18

• 17

Tags

NGSS.MS-PS1-1

Sodium has an atomic number of 11. How many protons does each sodium atom have?

• 33

• 22

• 11

• 0