Chemistry&chemical Safety

Question 1

Is any substance that occupies space and has mass(weight)

Answer 1

Matter

Question 2

Is the simplest form of chemical matter and contains only one type of atom/can’t be broken down into a simpler substance without a loss of identity

Answer 2

Elements

Question 3

There are _____ elements known to science today

Answer 3

118

Question 4

___ elements occur naturally on Earth

Answer 4

98

Question 5

Are the basic unit of matter/ with a nucleus at the center surrounded by negatively charged electrons that more around the nucleus in orbits

Answer 5

Atoms

Question 6

Is a chemical combination of two or more atoms in definite(fixed) proportions

Answer 6

Molecules

Question 7

Aka compounds/chemical combination of two or more atoms of different elements in fixed proportions

Answer 7

Compound molecules

Question 8

Water and salt are examples of

Answer 8

Pure substances

Question 9

A __is a physical combination of matter in any proportion

Answer 9

Physical mixture

Question 10

___,____,&____ are all physical mixtures

Answer 10

Solutions, suspensions,& emulsions

Question 11

The distinction between solutions, suspensions, and emulsions depends on the type of

Answer 11

Substance, size of particles, and the solubility of the substances

Question 12

Is a stable uniform mixture of two or more substances

Answer 12

Solution

Question 13

The ____ is the substance that is dissolved in a solution

Answer 13

Solute

Question 14

The ____ is the substance that dissolves the solute and makes the solution

Answer 14

Solvent

Question 15

Is known as the universal solvent because it has the ability to dissolve more substances than any other solvent

Answer 15

Water

Question 16

Liquids are mutually soluble meaning they can be mixed together from solutions

Answer 16

Miscible

Question 17

Liquids are not capable of being mixed together to form stable solutions

Answer 17

Immiscible

Question 18

Unstable physical mixtures of undissolved particles in liquid/ contain larger and fewer miscible particles

Answer 18

Suspensions

Question 19

Example of suspension

Answer 19

Glitter in nail polish, calamine lotion

Question 20

Is an unstable physical mixture of two or more immiscible substances plus a special ingredient called an emulsifier

Answer 20

Emulsion

Question 21

Is an ingredient that brings two normally incompatible materials together and bonds them into a uniform and fairly stable mixture

Answer 21

Emulsifier

Question 22

Are substances that allow oil and water to mix or emulsify/ the molecule has 2 distinct parts

Answer 22

Surfactants

Question 23

Head of the surfactant molecule/capable of combining with or attracting water

Answer 23

Hydrophilic

Question 24

The tail of the surfactant molecule/ attraction to fat and oils

Answer 24

Lipophilic

Question 25

Refers to how prolonged,repeated, or long term exposure to certain product ingredients can cause sensitivity in some people

Answer 25

Overexposure

Question 26

Is the principle used to describe how overexposure determines toxicity

Answer 26

Overexposure principle

Question 27

Is the separation of an atom or molecule into positive and negative ions

Answer 27

Ionization

Question 28

An ion with a negative charge is an

Answer 28

Anion

Question 29

An atom with a positive charge is an

Answer 29

Cation

Question 30

The hydroxide ion (OH-) is

Answer 30

Alkaline

Question 31

The more hydroxide ions there are in a substance, the more ___ it will be

Answer 31

Alkaline

Question 32

Is only possibly bc of this ionization of water

Answer 32

PH

Question 33

Only products that contain water can have a

Answer 33

PH

Question 34

A pH of 7 is a

Answer 34

Neutral solution

Question 35

Ph Below 7 Indicates an

Answer 35

Acidic solution

Question 36

A pH above 7 is

Answer 36

Alkaline solution

Question 37

Pure distilled water has a pH of 7, which is an equal balance of

Answer 37

Acid and alkaline

Question 38

For a productive have a pH it must

Answer 38

Contain water

Question 39

Occur when an acid is mixed with an alkali in equal proportions,balancing the total pH and forming water (h2o) and A salt

Answer 39

acid alkaline neutralization reactions

Question 40

Aka redox/a chemical reaction in which oxidation and reduction take place at the same time

Answer 40

Oxidation reduction

Question 41

When oxygen is chemically combined with a substance, the substance is

Answer 41

Oxidized

Question 42

Is a substance that releases oxygen

Answer 42

Oxidizing agent

Question 43

Is a substance that adds hydrogen to a chemical compound or subtracts oxygen from the compound

Answer 43

Reducing agent

Question 44

Meaning that they should not be mixed or even stored near each other

Answer 44

Incompatible

Question 45

Required by all law for products sold/ info about the manufacture

Answer 45

Safety data sheet

Question 46

Substance that causes or is believed to cause cancer

Answer 46

Carcinogen