Atoms

Question 1

What are atoms?

Answer 1

The building blocks of matter.

The smallest part of matter that has the properties of a chemical element

Question 2

How can the small size of atoms be demonstrated?

Answer 2

By serial dilution of a dye e.g. Potassium permanganate

Question 3

How many atoms are in 12g of carbon?

Answer 3

6.023 x 10 to the power of 23 atoms

Question 4

Tell me 3 facts about atoms

Answer 4

Small
Move/vibrate
Building blocks of matter

Question 5

Where does the word atom come from?

Answer 5

Greek ATOMOS meaning indestructible

A piece of matter that cannot be broken down further by chemical means

Question 6

3 states of matter

Answer 6

Solid
Liquid
Gas

Question 7

3 facts about solid

Answer 7

Tight packed atoms
Atoms vibrate
Has own shape
Cannot be squashed/compressed

Question 8

3 facts about liquid

Answer 8

Small spaces between atoms
Atoms move slowly
Takes shape of container
Cant be squashed compressed
(Used in hydraulics)

Question 9

3 facts about gases

Answer 9

Widely spaced atoms
Move quickly
Take shape of (expand to fill) container
Can be squashed/ compressed

Question 10

What is an element?

Answer 10

A pure substance (the simplest) consisting of one type of atom only

Question 11

How are elements arranged or organised

Answer 11

In the periodic table, from Left to right in order of atomic number

Question 12

In the periodic table what are

a
X
b

Answer 12

à is mass number
X is element
b is atomic number

Question 13

Who split the atom?

Answer 13

Ernest Walton

Nobel prize 1951

Question 14

What are atoms made of?

Answer 14

Sub atomic particles

Question 15

What r 3 types of subatomic particles

Answer 15

Protons
Neutrons
Electrons

Question 16

Tell me about electrons

Answer 16

e
-1 charge
1/2000 mass
In shells orbiting nucleus (orbits are really energy levels!)
1st shell 2 e
2nd 8e
3rd 8e
4th 32 e

Question 17

Tell about neutrons

Answer 17

N
No charge
Mass 1
In nucleus

Question 18

Tell about protons

Answer 18

P
+1 charge
Mass 1
In nucleus

Question 19

How many elements exist

Answer 19

90 natural
25 man made
115 total

Question 20

What is atomic no.

Answer 20

Number of protons

If neutral will also = number of electrons

Question 21

What is Mass no

Answer 21

Number of protons plus number of neutrons.

Question 22

Are no of P and N always same?

Answer 22

No

Question 23

Sodium

Answer 23

Na

Question 24

Phosphorous

Answer 24

P

Question 25

Nitrogen

Answer 25

N

Question 26

Copper

Answer 26

Cu

Question 27

Hydrogen

Answer 27

H

Question 28

Sulfur

Answer 28

S

Question 29

Potassium

Answer 29

K

Question 30

Oxygen

Answer 30

O

Question 31

Argon

Answer 31

Ar

Question 32

Aluminium

Answer 32

Al

Question 33

Draw

1
H
1

Answer 33

See book

Question 34

Draw
40
Ar
18

Answer 34

See book

Question 35

What does. K 2,8,8,1 mean

Answer 35

It means potSsium has 2 electrons in the first shell, 8 in the second, 8 in the third and 1 in the 4th

Question 36

Describe sodiums electrons in shorthand

Answer 36

Na 2,8,1

Question 37

Describe oxygen’s electrons in shorthand

Answer 37

O 2,6

Question 38

Describe Aluminium’s electrons in short hand

Answer 38

Al 2,8,3

Question 39

Name 5 jobs u need chemistry for

Answer 39

Doctor
Research chemist
Forensic scientist
Chemical Engineer
Laboratory technician