Proton, Neutrons, Electrons

Question 0

Electrons that are on the outermost energy level of an atom and are involved in bonding are ___

Answer 0

Valence electrons

Question 1

Which subatomic particle has a + charge?

Answer 1

Proton

Question 2

Which has the same # of valence electrons?

a) periods
b) groups

Answer 2

Groups

Question 3

Where are metals located on the periodic table?

Answer 3

Left side of zig zag

Question 4

Are most metals liquid or solid at room temp?

Answer 4

Solid

Question 5

Where are the most reactive metals found?

Answer 5

Alkali metals

Question 6

What are the 2 most common alkaline earth metals?

Answer 6

Magnesium and calcium

Question 7

Where are non metals?

Answer 7

Right of zig zag

Question 8

At room temp, more than half of the non metals are __

Answer 8

Gases

Question 9

Fluorine, chlorine, and bromine are part of the __ family

Answer 9

Halogen

Question 10

A chemical reaction that absorbs energy from it’s surrounding are ___ reactions

Answer 10

Endothermic

Question 11

What force holds atoms together?

Answer 11

Chemical bonds

Question 12

What happened when bonds break and new bonds are created?

Answer 12

Chemical reactions

Question 13

Any solid that forms and separates from a liquid mixture is a ____

Answer 13

Precipitate

Question 14

What is the only sure evidence that a chemical reaction has occured?

Answer 14

The composition of the matter changes

Question 15

A chemical equation expressed using letters and number is called a ___

Answer 15

Chemical equation

Question 16

Substance that undergoes change is a ___

Answer 16

Reactant

Question 17

Law of conservation of mass states:

Answer 17

Matter is neither created not destroyed

Question 18

2 or more substances react to form a single substance is a ___ reaction

Answer 18

Synthesis

Question 19

An ____ energy starts the reaction

Answer 19

Activation

Question 20

A ___ slows down the reactions

Answer 20

Inhibitor

Question 21

Substance reacts rapidly w/ oxygen, often producing heat and light

Answer 21

Combustion

Question 22

A large amount of a solute in a solvent

Ex: the tea you get tastes weak

Answer 22

Dilute

Question 23

1 that contains as much solute as the solvent can hold at a given temp.

Answer 23

Saturated solution

Question 24

What happens to the freezing point of a solution when a solute is added?

Answer 24

Freezing point is lowered

Question 25

Properties of bases?

Answer 25

• bitter taste
• slippery feel
• litmus blue paper

Question 26

Acids form what time of ions?

Answer 26

H+ and chloride

Question 27

pH scale measures?

Answer 27

Concentration of hydrogen ions in a solution

Question 28

Is a solution has a pH of 9, it is a ___

Answer 28

Base

Question 29

Reaction between an acid and a base is a ___

Answer 29

Neutralization

Question 30

What are the products of neutralization?

Answer 30

They are made of sodium, chloride ions, and water