C One

Question 1

What is an element?

Answer 1

Single type of atom

Question 2

What is an atom?

Answer 2

A very small particle

Question 3

What is a compound?

Answer 3

2 or more elements chemically bonded together

Question 4

What is the mass of electrons?

Answer 4

1/2000

Question 5

How to find number of protons and electrons?

Answer 5

Mass number

Question 6

How to find number of neutrons?

Answer 6

mass number - atomic number

Question 7

What is the formula for amonia?

Answer 7

NH3

Question 8

What is the formula for hydrochloric acid?

Answer 8

HCl

Question 9

What is the formula for sulfuric acid?

Answer 9

H2SO4

Question 10

What is pure?

Answer 10

Elements

Question 11

What are compounds?

Answer 11

2 or more elements chemically bonded together

Question 12

What is a mixture?

Answer 12

2 or more elements or compounds not chemically bonded together

Question 13

How to separate mixtures?

Answer 13

Distillation
evaporation
filtration
fractional distillation

Question 14

What is the plum pudding model?

Answer 14

pudding +

electrons dotted throughout -

Question 15

How was the plum pudding model developed?

Answer 15

Alpha gun shot rays at sheet of gold some went straight through others refracted proving electrons

Question 16

Who discovered the nucleus?

Answer 16

Rutherford

Question 17

who discovered neutrons?

Answer 17

chadwick

Question 18

who discovered current model?

Answer 18

Bohr

Question 19

What do groups tell?

Answer 19

Number of electrons in outer shell

Question 20

What do periods show?

Answer 20

number of shells

Question 21

Why is the overall charge of an atom 0?

Answer 21

+ and - cancel each other out

Question 22

What is an ions overall charge?

Answer 22

+/-

Question 23

What do metals loose becoming….

Answer 23

electrons becoming positive

Question 24

What do none metals lose becoming….

Answer 24

gain electrons becoming negative

Question 25

How did Newlands arrange the periodic table?

Answer 25

(octaves) mass into pattens

Question 26

How did Mendeleev arrange the periodic table?

Answer 26

By mass left spaces predicted properties - correct

Question 27

What are the nobel gasses properties?

Answer 27

Full outer shell un-reactive used in neon lights

Question 28

What are the halogens (group 7 properties)?

Answer 28

``` non metal more reactive at top share electrons in pairs very reactive only want to gain 1 high boiling point at bottom gain electrons (reduction) react violently with group one ```

Question 29

What are the alkali metals properties?

Answer 29

``` React with water easy to cut kept in oil more reactive as you go down group hight boiling points at top lose 1 electron ```

Question 30

What is energy in?

Answer 30

melting & evapourating

Question 31

what is energy out?

Answer 31

condensing and freezing

Question 32

What are the properties of a soild?

Answer 32

not flowing can't be compressed thick structure in fixed position

Question 33

What are the properties of a liquid?

Answer 33

Some movement not in fixed position can't be compressed

Question 34

What are the properties of a gas?

Answer 34

lots of movement flow can be compressed