Pure Substances

Question 1

How do we give different atoms names?

Answer 1

Based on the number of protons they have in their nuclei.

Question 2

True or False. Elements are not limited in number and are not the building blocks of millions of compounds.

Answer 2

False

Question 3

What do you call diatomic molecules?

Answer 3

Molecules of elements

Question 4

What do you call it when atoms react together chemically?

Answer 4

Molecules of compounds

Question 5

What is each elements on the periodic table represented by?

Answer 5

Symbol

Question 6

What are elements named after?

Answer 6

Latin/English words or named after a person.

Question 7

True or False, elements are arranged left to right and top to bottom in order of increasing atomic number and as the atomic number increases, so does the atomic mass.

Answer 7

True

Question 8

H

Answer 8

Hydrogen

Question 9

He

Answer 9

Helium

Question 10

Li

Answer 10

Lithium

Question 11

Be

Answer 11

Beryllium

Question 12

B

Answer 12

Boron

Question 13

C

Answer 13

Carbon

Question 14

N

Answer 14

Nitrogen

Question 15

O

Answer 15

Oxygen

Question 16

F

Answer 16

Fluorine

Question 17

He

Answer 17

Neon

Question 18

Na

Answer 18

Sodium

Question 19

Mg

Answer 19

Magnesium

Question 20

Al

Answer 20

Aluminium

Question 21

Si

Answer 21

Silicon

Question 22

P

Answer 22

Phosphorus

Question 23

S

Answer 23

Sulfur

Question 24

Cl

Answer 24

Chlorine

Question 25

Ar

Answer 25

Argon

Question 26

K

Answer 26

Potassium

Question 27

Ca

Answer 27

Calcium

Question 28

Cr

Answer 28

Chromium

Question 29

Mn

Answer 29

Manganese

Question 30

Fe

Answer 30

Iron

Question 31

Co

Answer 31

Cobalt

Question 32

Ni

Answer 32

Nickel

Question 33

Cu

Answer 33

Copper

Question 34

Zn

Answer 34

Zinc

Question 35

Br

Answer 35

Bromine

Question 36

Ag

Answer 36

Silver

Question 37

Sn

Answer 37

Tin

Question 38

I

Answer 38

Iodine

Question 39

Ba

Answer 39

Barium

Question 40

Pt

Answer 40

Platinum

Question 41

Au

Answer 41

Gold

Question 42

Hg

Answer 42

Mercury

Question 43

Pb

Answer 43

Lead

Question 44

U

Answer 44

Uranium

Question 45

What is a compound?

Answer 45

A substance that consists of atoms of 2+ different elements chemically bonded together.

Question 46

Table salt

Answer 46

Chemical name: sodium chloride Chemical symbol: NaCl Elements present: Na+Cl

Question 47

Epson Salts

Answer 47

Chemical name: Magnesium sulphate Chemical symbol: MgSo4 Elements present: Mg+S+O

Question 48

Caustic Soda

Answer 48

Sodium Hydroxide

Question 49

Caustic Soda

Answer 49

Chemical name: Sodium Hydroxide Chemical symbol: NaOH Chemicals present: Na+O+H

Question 50

Blue stone

Answer 50

Chemical name: copper(2) sulphate Chemical symbol: CuSO4 Elements present: Cu+S+O

Question 51

Carbon dioxide

Answer 51

Chemical name: carbon dioxide Chemical symbol: CO2 Elements present: C+O

Question 52

Water

Answer 52

Chemical name: dihydrogen oxide Chemical symbol: H2O Elements present: H+O

Question 53

What forms when 2+ atoms are chemically bonded together? This can be the same or different atoms.

Answer 53

Molecule

Question 54

What is a molecule?

Answer 54

Smallest particle of a substance that can exist on its own and have all the characteristics of that substance.

Question 55

What are the 7 diatomic molecules?

Answer 55

``` H2 N2 O2 F2 Cl2 Br2 I2 ```

Question 56

What is formed when 2+ different atoms combine?

Answer 56

Compound

Question 57

What can a chemical bond be defined as?

Answer 57

A FORCE THAT HOLDS ATOMS TOGETHER

Question 58

Compounds such as H20, CO, NaCl are founded by chemical reactions between the elements from which they are made

Answer 58

Synthesis reaction