Target 1-5

Question 0

Chemical symbol

Answer 0

One or two letter abbreviation of an element.

Question 1

Chemical formula

Answer 1

Shows the elements in the compound and the ratio of atoms.

Question 2

Groups

Answer 2

The columns of elements in the periodic table, the elements have similar characteristics and properties

Question 3

Heterogeneous mixture

Answer 3

You can usually see the different parts and they can easily be separated out

Question 4

Periodic table

Answer 4

An arrangement of elements that show a repeating pattern of their properties

Question 5

Atomic mass

Answer 5

The mass of the number of protons, neutrons, and electrons in an element (electrons don’t have a large impact because they don’t have a large mass)

Question 6

Periods

Answer 6

The rows of elements in the periodic table, the properties of the elements change in a pattern (metals-metalloids-nonmetals)

Question 7

Homogeneous mixture

Answer 7

Very evenly mixed so you can’t see the different parts, difficult to separate the parts from each other

Question 8

Chemical bond

Answer 8

Force of attraction between two atoms

Question 9

Molocule

Answer 9

A group of two or more atoms held together by chemical bonds

Question 10

Compound

Answer 10

A substance made of two or more DIFFERENT elements that are chemically combined in a set ratio

Question 11

Element

Answer 11

A substance that can’t be broken down into any other substances by physical or chemical means

Question 12

Sub-atomic particles

Answer 12

Protons, neutrons, and electrons

Question 13

Atomic number

Answer 13

The number of protons in an element (equal to the number of electrons if neutrally charged)

Question 14

Atom

Answer 14

Basic particle from which all elements are made

Question 15

Chemical equation

Answer 15

A way to show a chemical reaction using symbols instead of words, all the atoms present at the beginning of the reaction are present at the end of the reaction

Question 16

Reactants

Answer 16

The substances that go through the chemical change

Question 17

Valence electron

Answer 17

The electrons located in the outermost shell, involved in chemical bonding

Question 18

Clues that a chemical change has happened

Answer 18

Two liquids can form a precipitate (solid that forms from two liquids mixing together), gas bubbles, color change (apple slice turning brown)

Question 19

Products

Answer 19

The new substance that is formed

Question 20

Law of conservation of mass

Answer 20

Matter is not created or destroyed

Question 21

Chemical change

Answer 21

The atoms rearrange to form new substances; examples: burning or rusting

Question 22

Electron dot diagram

Answer 22

Each dot stands for one valence electron

Question 23

Chemical bond

Answer 23

The force of attraction that hold atoms together as a result of the rearrangement of electrons between them

Question 24

Physical change

Answer 24

Any change that alters the form or appearance of a substance but does not change it into another substance; examples: bending a leaf in half, crushing a can, breaking glass, melting point, freezing, boiling point, density, conductivity