Atoms

Question 1

What is the mass of a proton?

Answer 1

1

Question 2

What is the charge of a proton?

Answer 2

+1

Question 3

What is the mass of a neutron?

Answer 3

1

Question 4

What is the charge of a neutron?

Answer 4

0

Question 5

What is the mass of an electron?

Answer 5

Very small

1/2000

Question 6

What is the charge of an electron?

Answer 6

-1

Question 7

Where is the atomic number?

Answer 7

Top number
smaller number
No. protons or electrons

Question 8

Where is the mass number?

Answer 8

bottom number of largest number

Protons + neutrons

Question 9

Formula for Carbon Dioxide?

Answer 9

CO2

Question 10

Formula for a Water

Answer 10

H20

Question 11

Formula for oxygen gas

Answer 11

O2

Question 12

Formula for hydrogen gas

Answer 12

H2

Question 13

Formula for Nitrogen gas

Answer 13

N2

Question 14

Formula for ammonia

Answer 14

NH3

Question 15

Formula for hydrochloric acid

Answer 15

HCl

Question 16

Formula for sulphuric acid

Answer 16

H2SO4

Question 17

What is an ion?

Answer 17

A particle that is electrically charged when an atom loses or gains an electron to form a full outer shell

Question 18

What are metals made up of?

Answer 18

Positive atoms in a sea of delocalised electrons

Question 19

Why can metals conduct electricity and heat?

Answer 19

There is delocalised electrons

Question 20

What are alloys made up of?

Answer 20

Positive ions, delocalised electrons.

However, a metal or non metal has been added

Question 21

Properties of pure metals

Answer 21

Layers which can slide

So they’re soft

Question 22

Properties of alloy

Answer 22

Distorted layers which can’t slide

Means they’re hard

Question 23

What is the reactivity series?

Answer 23

Potassium
Lithium
Calcium
Magnesium
Aluminium
Carbon
Zinc
Iron
Hydrogen
Copper
Silver
Gold
Platinum

Question 24

What elements are separated using electrolysis?

Answer 24

Potassium
Lithium 
Calcium
Magnesium
Aluminium

Question 25

What elected are separated using Reduction?

Answer 25

Zinc and Iron

Question 26

What atoms are found in the form of metal oxides?

Answer 26

Copper Silver Gold Platinum

Question 27

What happens when the metal is more reactive than hydrogen in electrolysis?

Answer 27

You’ll get hydrogen as the gas

Question 28

What happens if the metal is less reactive than hydrogen in electrolysis?

Answer 28

Won’t get hydrogen

Question 29

Explain displacement reactions

Answer 29

When metal1 is more reactive than the metal2 in the compound, then metal 1 displaces metal 2 and becomes a compound

Question 30

What does OILRIG mean?

Answer 30

``` Oxidation Is Loss of electrons Reduction Is Gain of electrodes ```

Question 31

Is the cathode positive or negative?

Answer 31

Negative

Question 32

Name the positive electrode?

Answer 32

Anode

Question 33

Half equations for electrolysis

Answer 33

Cu2+ + 2e- -> Cu. Reduction at cathode 2F- - 2e- -> F2 Oxidation at anode

Question 34

What is nanotechnology?

Answer 34

Taking atoms and rearranging them into specific locations or sizes so we can use it Very small Increase surface areas

Question 35

What are nano particles?

Answer 35

Refers to structures that are 1-100nm in size, of the order of a few hundred atoms. 1x10 to the power of -9nm

Question 36

What are fine particles?

Answer 36

PM 2.5 | Diameters between 1-100nm and 2500nm (1x10 -7 and 2.5 x 10-6)

Question 37

What are coarse particles?

Answer 37

PM 10 Diameters between 2500nm and 10000nm (2.5x10 -6 and 1x10 -5) Dust

Question 38

What does surface area to volume mean for nanoparticles?

Answer 38

Gives them different properties and means that they can be used in smaller quantities As side of cube decreases by factor of 10, surface area increases to volume ratio increases by factor of 10

Question 39

Uses of nanoparticles

Answer 39

Medicines, electronics, cosmetics and sun creams, as deodorants and catalysts. Important area for scientific research.

Question 40

Possible risks of nanoparticles

Answer 40

Small size so can be breathed in, or pass into cells. Toxic substances could bind to them because of large surface area to volume ratio.