Elements, Compounds And Mixtures

Question 1

What are the 6-10 elements

Answer 1

6. Carbon
7. Nitrogen
8. Oxygen
9. Fluorine
10. Neon

Question 2

What are the 11-15 elements

Answer 2

11. Sodium
12. Magnesium
13. Aluminium
14. Silicon
15. Phosphorus

Question 3

What are the 16-20 elements

Answer 3

16. Sulfur
17. Chlorine
18. Argon
19. Potassium
20. Calcium

Question 4

What is the symbol for hydrogen

Answer 4

H

Question 5

What is the symbol for helium

Answer 5

He

Question 6

What is the symbol for lithium

Answer 6

Li

Question 7

What is the symbol for beryllium

Answer 7

Be

Question 8

What is the symbol for boron

Answer 8

B

Question 9

What is the symbol for carbon

Answer 9

C

Question 10

What is the symbol for nitrogen

Answer 10

N

Question 11

What is the symbol for oxygen

Answer 11

O

Question 12

What is the symbol for fluorine

Answer 12

F

Question 13

What is the symbol for neon

Answer 13

Ne

Question 14

What is the symbol for sodium

Answer 14

Na

Question 15

What is the symbol for magnesium

Answer 15

Mg

Question 16

What is the symbol for aluminium

Answer 16

Al

Question 17

What is the symbol for silicon

Answer 17

Si

Question 18

What is the symbol for phosphorus

Answer 18

P

Question 19

What is the symbol for Sulfur

Answer 19

S

Question 20

What is the symbol for chlorine

Answer 20

Cl

Question 21

What is the symbol for Argon

Answer 21

Ar

Question 22

What is the symbol for potassium

Answer 22

K

Question 23

What is the symbol for calcium

Answer 23

Ca

Question 24

How many naturally occurring elements are there

Answer 24

92

Question 25

List 2 examples of compounds

Answer 25

Water= hydrogen + oxygen | Table salt= sodium + chlorine

Question 26

What is an element

Answer 26

A pure substances made up of one kind of atom

Question 27

What is an atom

Answer 27

An atom is made up of 3 sub atomic particles, protons, neutrons and electrons

Question 28

What does an electron do

Answer 28

Electrons orbit the nucleus which is located at the centre of the atom and houses the protons and neutrons

Question 29

What charge do protons have

Answer 29

Positive

Question 30

What charge does electrons have

Answer 30

Negative

Question 31

What charge does neutrons have

Answer 31

Neutral

Question 32

What is the atomic number related to

Answer 32

The number of protons = the atomic number

Question 33

How can u find the number of neutrons

Answer 33

Mass number- atomic number = number of neutrons

Question 34

How can u find the mass number

Answer 34

The sum of protons and neutrons

Question 35

How many electrons can each electron shell hold

Answer 35

1- a max of 2 2- a max of 8 3- a max of 8

Question 36

What 2 elements have electrons in the 4th shell

Answer 36

Potassium and calcium

Question 37

Describe a compound

Answer 37

More than one element makes a compound. In compounds the atoms of one element are bonded very tightly

Question 38

Describe a mixture

Answer 38

Mixtures can be made up of 2 or more elements or compounds. The substances that make up mixtures can be usually be easily separated

Question 39

When creating a compound what are the 2 elements called

Answer 39

They are called reactants and they produce a product

Question 40

What are the first five elements.

Answer 40

1. Hydrogen 2. Helium 3. Lithium 4. Beryllium 5. Boron