Chap 1 Part A - Sheet1

Question 1

Chemistry

Answer 1

The study of the nature, properties and transformations of matter.

Question 2

Matter

Answer 2

Anything that has mass and occupies space, that is, things you can see, touch, taste, or smell.

Question 3

Scientific Method

Answer 3

The process of observation, hypothesis, and experimentation used to expand a body of knowledge.

Question 4

Property

Answer 4

A characteristic useful for identifying a substance or object. These include size, color, and temperature, as well as chemical composition and chemical reactivity.

Question 5

Physical Change

Answer 5

A change that does not affect the chemical makeup of a substance or object.

Question 6

Chemical Change

Answer 6

A change in the chemical makeup of a substance.

Question 7

Matter exists in 3 forms

Answer 7

solid, liquid, gas

Question 8

Solid.

Answer 8

A substance that has a definite shape and volume.

Question 9

Liquid.

Answer 9

A substance that has a definite volume but assumes the shape of its container.

Question 10

Gas.

Answer 10

A substance that has neither a definite volume nor a definite shape.

Question 11

Substances are classified as

Answer 11

pure substances or mixtures.

Question 12

Pure substance.

Answer 12

A substance that has a uniform chemical composition throughout.

Question 13

Mixture.

Answer 13

A blend of two or more substances, each of which retains its chemical identity.

Question 14

Homogeneous mixture.

Answer 14

A uniform mixture that has the same composition throughout.

Question 15

Heterogeneous mixture

Answer 15

.A non-uniform mixture that has regions of different composition.

Question 16

Components of a mixture can be separated

Answer 16

without changing their identities.

Question 17

Pure substances can be classified into two groups

Answer 17

element and chemical compounds

Question 18

Element.

Answer 18

A fundamental substance that cannot be broken down chemically into any simpler substance.

Question 19

Chemical compound.

Answer 19

A pure substance that can be broken down into simpler substances by chemical reactions.

Question 20

what do you call that which is written on the left

Answer 20

reactant (exp water)

Question 21

what do you call that on right

Answer 21

products (hydrogen and oxygen)

Question 22

what connects parts of chemical reaction

Answer 22

An arrow connects the two parts to indicate a chemical reaction. The conditions necessary are written above and below the arrow.

Question 23

how many elements, how many naturally

Answer 23

118 elements have been identified. 91 occur naturally.

Question 24

what are 3 core groups in peirodic table

Answer 24

metals (majority ), nonmetals, metalloids

Question 25

characteristics of metals

Answer 25

94 on left side, good conductors Heat Electricity, lusturous, solid room temp (ex. Mecury), maluable

Question 26

Characteristics of nonmetals

Answer 26

18, occur right side, 11 gases 6 solids, 1 (bromine) liquid. Poor conductors Heat Electricity, Brittle when solid

Question 27

characteristics of metalloid

Answer 27

6, zizag between metals and nonmetals, properties intermediate betwen metals and nonmetals

Question 28

how tell chemical reaction taking place

Answer 28

change color, dissolving material (nickel) bubbles gas (hydrogen)

Question 29

Physical quantity.

Answer 29

A physical property that can be measured.

Question 30

Unit.

Answer 30

A defined quantity used as a standard of measurement.