Quiz about 8.P.1.1, 8.P.1.2, 8.P.1.3

Question 1

Which is the best description of one particle of table salt (NaCl)?

Accepted Answer

compound

Answer

atom

Answer

element

Question 2

Which is the best example of a pure substance?

Accepted Answer

gold

Answer

peanuts

Answer

milk

Answer

air

Question 3

How can mixtures best be described?

Accepted Answer

made of different elements that are not all chemically bonded together

Answer

made of one element

Answer

made of different elements that are all chemically bonded together

Question 4

Which chemical formula is an example of a compound?

Accepted Answer

H2SO4

Answer

O2

Answer

2Cl

Question 5

Why is carbon an element and not a compound?

Accepted Answer

All carbon atoms have the same number of protons.

Answer

Carbon bonds easily with oxygen, but not helium.

Answer

Carbon is found in all living organisms.

Question 6

Hydrogen peroxide (H₂O₂ ) and water (H₂O) both contain hydrogen(H) and oxygen (O). Why are they different compounds?

Accepted Answer

Hydrogen peroxide contains one more oxygen than water.

Answer

Hydrogen peroxide contains two more oxygens than water.

Answer

Hydrogen peroxide contains one less oxygen than water.

Question 7

Which is a mixture?

Accepted Answer

salad

Answer

H2O

Answer

table salt

Question 8

Water (H₂O) and table salt (NaCl) can be combined to form salt water. How can this combination be classified?

Accepted Answer

as a mixture because the water (H₂O) can be evaporated andphysically separated from the table salt (NaCl)

Answer

as a compound because the water (H₂O) and table salt (NaCl) arechemically combined

Answer

as a compound because the water (H₂O) and table salt (NaCl) form anew pure substance

Question 9

Which substance is composed of only one type of atom?

Accepted Answer

element

Answer

mixture

Answer

solution

Question 10

How many elements are in one molecule of glucose (C₆H₁₂O₆ )?

Accepted Answer

3

Answer

1

Answer

6

Question 11

What general category describes the majority of the elements in theperiodic chart?

Accepted Answer

metals

Answer

liquids

Answer

nonmetals

Question 12

Which best describes the classification of an element that is a shinysolid, conducts electricity, and has an atomic mass of approximately 108?

Accepted Answer

It is a metal

Answer

It is synthetic

Answer

It is a metalloid

Question 13

Which conclusion can be made about calcium and magnesium in thesame group on the periodic table?

Accepted Answer

They are both reactive metals

Answer

They both have complete outer shells.

Answer

They are both semi-conductors of heat and electricity.

Question 14

What do all the noble gases on the periodic table have in common?

Accepted Answer

They are generally unreactive.

Answer

They are generally highly reactive.

Answer

They are generally metalloids.

Question 15

How many protons are in a sodium atom?

Accepted Answer

Sodium has 11 protons

Answer

Sodium has 1 proton.

Answer

Sodium has 3 protons.

Question 16

Which best explains why scientists have arranged elements number 57 to 102 apart from the rest of the elements of the periodic table?

Accepted Answer

They all have unique properties that set them apart.

Answer

They are all radioactive.

Answer

They are all synthetic.

Question 17

What is the relationship between elements with 6, 14, and 82 protons in their nuclei on the periodic table of elements?

Accepted Answer

They are in the same group.

Answer

They are in the same period.

Answer

They have the same atomic mass

Question 18

Tungsten fits best into which category?

Accepted Answer

element

Answer

compound

Answer

mixture

Answer

molecule

Question 19

What is the smallest unit of an element that retains the properties of that element?

Accepted Answer

atom

Answer

electron

Answer

molecule

Answer

neutron

Question 20

What happens to water molecules during the boiling process?

Accepted Answer

They move faster and move farther apart as they absorb heat.

Answer

They move faster and remain close together as they absorb heat.

Answer

They move more slowly but move farther apart as they lose heat.

Answer

They move faster and move farther apart as they lose heat.

Question 21

What chemical reaction results in the formation of a solid?

Accepted Answer

precipitate

Answer

acid base reaction

Answer

endothermic

Question 22

When baking soda and vinegar react, the product includes bubbles. Whathas most likely occurred?

Accepted Answer

gas formation

Answer

exothermic reaction

Answer

precipitate formation

Question 23

What is the best evidence for a chemical reaction?

Accepted Answer

color change

Answer

cutting a metal

Answer

change of state

Question 24

Food spoiling is a chemical reaction. What is the best way to keep food fresh and edible?

Accepted Answer

Put the food in the refrigerator.

Answer

Leave the food on the counter at room temperature.

Answer

Wrap food in aluminum foil.

Question 25

Which best demonstrates a physical change?

Accepted Answer

change in state

Answer

change in temperature

Answer

formation of a gas

Question 26

Which best represents a physical change?

Accepted Answer

condensation

Answer

bubbling

Answer

formation of a precipitate

Answer

formation of a new substance

Question 27

Sam finds a block made from an unknown element. Which is the best way to determine which element was used to create the block?

Accepted Answer

calculate the density of the block

Answer

test the malleability of the block

Answer

determine the mass of the block

Answer

observe the reaction between the block and a nonmetal

Question 28

Which term describes the relationship between the mass and volume of a substance?

Accepted Answer

density

Answer

solubility

Answer

specific heat

Answer

melting point

Question 29

What is needed to change ice into water?

Accepted Answer

energy

Answer

air

Answer

stirring

Answer

chemicals

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