Chemistry Basics

Question 1

In the process of filtration, what is the material called that is left on the filter?

Accepted Answer

residue

Question 2

Identify the separation method shown in the diagram.

Accepted Answer

magnetic attraction

Question 3

The smallest particle of an element is call a(n)

Accepted Answer

atom

Question 4

Which one of the materials listed is a mixture?

Accepted Answer

saltwater

Question 5

The simplest, purest substances that cannot be broken down into any other substances are called

Accepted Answer

element

Question 6

Identify the molecular model of this compound.

Accepted Answer

NH3

Question 7

The compound shown in the picture is

Accepted Answer

iron oxide

Question 8

In a solution, the largest amount of a substance in the solution is called the ________.

Accepted Answer

solvent

Question 9

Identify the separation method shown in the diagram.

Accepted Answer

chromatography

Question 10

As elements form compounds the compound keeps the chemical&physical properties of the elements.

Accepted Answer

False

Question 11

Evaporation means going from a liquid to a ____________ physical state.

Accepted Answer

gaseous

Question 12

Identify the separation method shown in the diagram.

Accepted Answer

settling

Question 13

Which one of the following is NOT an example of a separation method?

Accepted Answer

boiling an egg

Question 14

Water, ammonia, sodium chloride, iron oxide and carbon dioxide are examples of

Accepted Answer

compounds

Question 15

To get salt out of a solution (separating salt from water) we could try.....

Accepted Answer

evaporating off the water

Question 16

To get iron filings out of sand, what method could he use to separate these two solids?

Accepted Answer

magnetic attraction

Question 17

In a solution, the smallest amount of a substance in the solution is called the

Accepted Answer

solute

Question 18

How many elements are in the compound sodium chloride or salt?

Accepted Answer

2

Question 19

Identify the molecular model of the compound in the picture.

Accepted Answer

CO2

Question 20

The compound shown in the picture is

Accepted Answer

water

Question 21

A mixture that is NOT uniform (the same) throughout, is referred to as a

Accepted Answer

heterogeneous mixture

Question 22

Identify the separation method shown in the diagram.

Accepted Answer

evaporation

Question 23

Select the compound!

Accepted Answer

CO2

Question 24

A mixture that is uniform (the same) throughout, is referred to as a

Accepted Answer

homogeneous mixture

Question 25

Two or more substances combined together, but not chemically combined are known as a

Accepted Answer

mixture

Question 26

The model picture is an example of

Accepted Answer

salt/NaCl

Question 27

Methods used to separate mixtures are based on the ____ properties of the parts of the mixture.

Accepted Answer

physical

Question 28

Carbon, hydrogen, oxygen, nitrogen, iron, sodium and chlorine are examples of

Accepted Answer

elements

Question 29

Which of the following is NOT a mixture?

Accepted Answer

water

Question 30

A molecule

Accepted Answer

is formed when two or more atoms join together chemically

Question 31

Which particles in the atom are in the nucleus?

Accepted Answer

protons and neutrons

Question 32

A compound made up of a greenish-yellowish toxic gas & a silvery metal that explodes in water?

Accepted Answer

sodium chloride

Question 33

Which of the following shows the elements that chemically combine to form table salt?

Accepted Answer

Na + Cl

Question 34

What is true of a compound?

Accepted Answer

does not retain the properties of substances that make it up

Question 35

Which one of the following methods is used to separate the colors in food dyes?

Accepted Answer

chromatography

Question 36

Made of two or more substances that are chemically combined in a specific ratio.

Accepted Answer

compound

Chemistry Basics

Questions 36

Chemistry Basics

Questions 36