Question 1

Which of the following is true of the mass of an atom?

Accepted Answer

an atom's mass is a combination of the mass of protons and neutrons

Answer

an atom's mass is equal to the atomic number

Answer

an atom's mass is a combination of the mass of neutrons and electrons

Question 2

How many neutrons are found in a neutral atom of selenium?

Accepted Answer

45

Answer

79

Answer

34

Question 3

Which of the following is considered a chemical property?

Accepted Answer

flammability

Answer

melting temperature

Answer

color

Question 4

What is the mass number of osmium?

Accepted Answer

190

Answer

76

Answer

114

Question 5

What is the atomic number of Hafnium?

Accepted Answer

72

Answer

250

Answer

106

Question 6

Which of the following statements mentions a chemical property?

Accepted Answer

I shouldn't store sodium hydroxide near acids because it could violently react.

Answer

I really hope the sun comes out soon to melt all of the ice on the ground.

Answer

I really like that shade of blue.

Question 7

Which of the following best represents the difference between mass and weight?

Accepted Answer

mass is the amount of matter in a substance whereas weight is the force of gravity on mass

Answer

mass is the amount of a substance in a given volume

Answer

mass is the amount of volume in a given amount of a substance

Question 8

Which of the following represents a molecule?

Accepted Answer

sugar

Answer

electron

Answer

iron

Question 9

What is the density of a substance if it has a mass of 16.23 g and a volume of 23.86 mL?

Accepted Answer

0.680 g/mL

Answer

1.47 g/mL

Answer

40.1 g/mL

Question 10

Which subatomic particle is found outside of the nucleus of the atom?

Accepted Answer

electron

Answer

neutron

Answer

argon

Question 11

How many protons are there in an atom of Radon?

Accepted Answer

86

Answer

308

Answer

136

Question 12

What is the mass of quartz if it has a density of 2.65 g/cm3 and a volume of 129.4 cm3?

Accepted Answer

342.91 g

Answer

0.0205 g

Answer

132.05 g

Question 13

Which of the following is considered a compound?

Accepted Answer

water

Answer

helium

Answer

oxygen

Question 14

Which of the following could be considered a physical property?

Accepted Answer

color

Answer

toxicity

Answer

reactivity to acids

Question 15

How many neutrons are found in a neutral atom of gold?

Accepted Answer

118

Answer

79

Answer

197

Question 16

How many protons are found in a neutral atom of arsenic?

Accepted Answer

33

Answer

108

Answer

75

Question 17

Which of the following best describes density?

Accepted Answer

density is the amount of mass of a substance in a given volume

Answer

density is the amount of matter in a substance

Answer

density is the amount of volume of a substance divided by its mass

Question 18

What is the density of lead if a block of lead has a mass of 52.86 g and a volume of 4.66 mL?

Accepted Answer

11.34 g/mL

Answer

0.0882 g/mL

Answer

246.3 g/mL

Question 19

What is the atomic symbol of antimony?

Accepted Answer

Sb

Answer

Sn

Answer

An

Question 20

Which atomic particle is found in the nucleus of the atom?

Accepted Answer

both electrons and neutrons

Answer

krypton

Answer

neutron

Question 21

What is the volume of hydrogen peroxide if it has a density of 1.45 g/mL and a mass of 24.8 g?

Accepted Answer

17.1 mL

Answer

26.25 mL

Answer

35.96 mL

Question 22

Which of the following is true of electrons?

Accepted Answer

in order to be neutral, the number of electrons and protons will be the same

Answer

there are 2 electrons in a neutral atom of hydrogen

Answer

electrons and protons will be found in the nucleus of the atom

Question 23

How many atoms are found in a molecule of caffeine (C8H10N4O2)?

Accepted Answer

24

Answer

10

Answer

4

Question 24

Which of the following terms refers to a group or two or more atoms bound together?

Accepted Answer

molecule

Answer

density

Answer

atom

Question 25

Which of the following is not considered a compound?

Accepted Answer

02

Answer

MgCl2

Answer

H20

Question 26

Which of the following will be able to float in oil that has the following stats: [Mass of 45.40 g and Volume of 56.75 mL]

Accepted Answer

Maple (0.745 g/mL)

Answer

Sugar (1.59 g/mL)

Answer

None of these

Question 27

Which of the following best describes the formula, H3PO4?

Accepted Answer

It is both a molecule and a compound

Answer

It is a compound but not a molecule

Answer

It is neither a molecule or a compound

Question 28

How many atoms are in a molecule of insulin (C256H387N65O79S6)

Accepted Answer

793

Answer

643

Answer

387

Question 29

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

Accepted Answer

54

Answer

185

Answer

77

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