Topic C1 Atomic structure and the periodic table

Question 1

Define a element

Answer 1

A chemical made of one type of atom

Question 2

Define a compound

Answer 2

More than on type together

Question 3

Define a mixture of elements

Answer 3

More than one type not connected

Question 4

Define a mixture of compounds

Answer 4

different compounds not joined together

Question 5

Define mixture of elements and compounds

Answer 5

when compounds and elements are mot connected

Question 6

Define a mixture

Answer 6

Different types of particles not joined together

Question 7

What are the names of all types of separation techniques ?

Answer 7

Filtration

crystallisation

simple distillation

fractional distillation

chromatography

Question 8

Filtration ?

Answer 8

Separates insoluble mixtures like sand. This is because sand can not dissolve

The filtration paper stops the insoluble mixture and lets the insoluble one through and separates them

Good for separating things that can not be dissolved

Question 9

Crystallisation ?

Answer 9

Used for separating solids and liquids

The solution is warmed in a container allowing the solvent to dissolve. As the solution is cooled the crystals will grow

useful to create a different use for the substance

Question 10

simple distillation

Answer 10

simple distillation is a procedure by which it separates two liquids with different boiling points

The mixture is heated in a flash. Ethanol has a lower boiling point so it evaporates quicker than the other liquid.

Used to separate liquids with a 50 degree difference

Question 11

Fractional distillation

Answer 11

Separation of a liquid mixture into fractions differing in boiling points

eg The crude oil is evaporated and its vapours allowed to condense at different temperatures in the column

Separate mixtures into different parts

Question 12

Chromatography

Answer 12

A technique of a mixture by passing it in a solution or suspension through a medium

used to separate mixtures into their components

separating two or more colours or liquids

Question 13

Which method would you use to separate ink ?

Answer 13

Chromatography

Question 14

Which method would you use to separate silver chloride ?

Answer 14

Filtration

Question 15

How could you get crystals from concentrated solution of copper sulfate ?

Answer 15

crystallisation

Question 16

Electron key ideas

Answer 16

Relative mass = 0.0005

relative charge = negative

location = the outside of the nucleus orbit

Question 17

Proton key ideas

Answer 17

Relative mass = 1

Relative charge = positive

location = the inside of the nucleus

Question 18

Neutron key ideas

Answer 18

Relative mass = 1

Relative charge = neutral

location = the inside of the nucleus

Question 19

Which components of an atom are involved when elements react to form compounds ?

Answer 19

Electrons

Question 20

Which components of an atom are important in nuclear reactions ?

Answer 20

Anything in the nucleus

Question 21

How is an atom different ITfrom a ion ?

Answer 21

It has a charge because it has gained or lost electrons

Question 22

What is the same with all elements ?

Answer 22

They all have electrons , protons and neutrons

Question 23

Define an isotope

Answer 23

An atom that has a number of protons but different number of neutrons

Question 24

Metals physical properties

Answer 24

lustrous 
Hard 
Density 
High tensile strength 
High melting and boiling point 
conductor of heat 
Conductor of electricity

Question 25

Metals chemical properties

Answer 25

Reacts with o2
reacts with acid
oxides are basic
forms positive ions

Question 26

Non-metals properties

Answer 26

density 
poor tensile strength 
poor melting and boiling points 
poor conductor of heat 
poor conductor of electricity