Unit 1 Vocabulary

Question 1

Sublimation

Answer 1

Solid -> Gas

skips liquid stage

Question 2

Deposition

Answer 2

Gas -> Solid

Skips liquid stage

Question 3

Coefficients

Answer 3

Number that shows how many molecules of a substance are involved in a chemical reaction.
Ex) 2H2O
^Coeff. 1sts 2

Question 4

Molecule

Answer 4

Smallest part of a substance that has all the properties of that substance - more than 1 element

ex) H20 -> H2 + O

Question 5

Chemical Bond

Answer 5

Force of attraction that holds atoms together.

Question 6

Energy Level

Answer 6

Place in electron is most likely to be found (rings)

2, 8, 18, 32

Question 7

Atomic Mass

Answer 7

Total mass of protons and neutrons in an atom

bottom

Question 8

Electron

Answer 8

• neg charge
• electron cloud (found in)

of electrons = atomic # unless its unbalanced

Al^3+ (charge of 3)
^Means 3 more protons than electrons. Atomic # - charge = electrons

Vice Verca 3- means 3 more electrons than atomic #

Question 9

Neutrons

Answer 9

• no charge
• nucleus

of neutrons = atomic mass - atomic #

Question 10

Proton

Answer 10

• • charge
• nucleus
  # of protons in element is ALWAYS the atomic number

ex) Carbon (6) = 6 PROTONS

Question 11

Nucleus

Answer 11

Center of atom where protons and neutrons are found

Question 12

Element

Answer 12

Substance that CANNOT be chemically broken down into simpler substances

ex) Hydrogen, Helium, etc.

A pure substance made of only one kind of atom

Question 13

Atom

Answer 13

Smallest part of an element that can be identified as that element

think bohrs model

Question 14

Chemical Reaction

Answer 14

Process in which new substances with new chem and phys properties are formed.

reactant : substance changed
product: substance formed

Question 15

Plasma

Answer 15

state of matter made up of electrically charged particles

needs high temp and high pressure

Question 16

Gas

Answer 16

No definite shape or volume

Question 17

Liquid

Answer 17

Definite volume, indefinite shape

Question 18

Solid

Answer 18

Definite shape, definite volume

Question 19

Non Metal (properties)

Answer 19

• brittle
• bad conductor
• not malleable
• not shiny

Question 20

Metal properties

Answer 20

• shiny
• luster
• ductility
• malleability
• ductile

Question 21

Luster

Answer 21

glaze/reflective

Question 22

Ductitlity

Answer 22

Stretch, bend in response to stress

Question 23

Malleability

Answer 23

Bend (typically affected by hammering or “mallet”) ability to be hammered into different shapes.

Question 24

Ductile

Answer 24

Ability to be drawn into thin wires

Question 25

Noble Gases

Answer 25

Elements that make up group 18 (last group on right of periodic table)

Question 26

Halogens

Answer 26

Elements that make up group 17 (2nd to last group on right of periodic table)

Question 27

Compound

Answer 27

2 elements mixed together to create a substance ex) NaCl A substance made up of atoms of two or more different elements joined by chemical bonds

Question 28

Mixtures

Answer 28

A combination of two or more substances that are not chemically combined

Question 29

homogeneous mixture

Answer 29

a mixture that is uniform in composition; components are evenly distributed and are not easily distinguished.

Question 30

heterogeneous mixture

Answer 30

A mixture in which different components can be distinguished easily

Question 31

Filtration

Answer 31

the process that separates a solid from the liquid in a heterogeneous mixture

Question 32

Evaportation

Answer 32

The change of state from a liquid to a gas to separate a homogeneous mixture.

Question 33

Distillation

Answer 33

A process that separates the substances in a solution based on their boiling points

Question 34

Law of Conservation of Mass

Answer 34

Matter is not created nor destroyed in any chemical or physical change

Question 35

Compound Formula

Answer 35

Represents the combination of two or more elements. Symbol= tells you the element Subscript (#)= tells you the # of atoms

Question 36

To separate mixtures

Answer 36

- Magnetism - Filtration - Distillation - Evaporation - Manual

Question 37

Signals Chemical Reaction

Answer 37

- color change - bubbling/gas formation - temperature change - formation of a solid

Question 38

Color

Answer 38

Physical Property

Question 39

Flammability

Answer 39

Chemical property

Question 40

Digestibility

Answer 40

chemical property

Question 41

Density

Answer 41

Physical Property

Question 42

Sig Fig Rules

Answer 42

``` + 1-9 Always count + Zeros Between two numbers 1-9 COUNT ex) 607 has 3 sig figs + Zeros following numbers do NOT count ex) 47, 000 has 2 sig figs ``` + If it has a decimal, find the leftmost non zero number. Numbers to the left do NOT count, but ALL numbers to the right count ex) 8410.00 has 6 sig figs ex) 0.130 L has 3 sig figs (the first 0 does not count because it is on the left of the leftmost nonzero number ex) 0.008320 has 4 sig figs

Question 43

Isotope

Answer 43

atom with same number of protons but dif number of neutrons (same element)