Key Terms Ans Random Shit

Question 1

How do you find the mass number

Answer 1

Total number of protons and neutrons

Question 2

How are compounds formed

Answer 2

Compounds are formed when atoms of two or more elements chemically combined together e.g. carbon dioxide

Question 3

What’s an isotope

Answer 3

Isotopes are different atomic forms of the same element which have the same number of protons but different number of neutrons

Question 4

What’s are 2 popular isotopes

Answer 4

Carbon 12 and carbon 14

Question 5

What’s ionic bonding

Answer 5

In ionic bonding atoms lose or gain electrons to form charged particles called ions which are then strongly attracted to one another because of positive and negative charges

Question 6

What do you all atoms over the left hand side of the periodic table have (groups 1/2)

Answer 6

One or two electrons in their outer shell which they want to “get rid off”

Question 7

What do all atoms over the right hand side of the periodic table have (groups 6/7)

Answer 7

Outer shells which are nearly full

Question 8

What else happens in ionic bonding

Answer 8

In ionic bonding atoms don’t become one instead atoms lose all gain electrons and then attached to each other/stick to each other because of negative/positive charges

Question 9

What do Ionic compounds always have

Answer 9

Giant ionic lattices

Question 10

What’s the example of a giant ionic lattice

Answer 10

A single crystal of sodium chloride (salt)

Question 11

What are the properties of ionic compounds

Answer 11

.high melting points
.hight boiling points
.dissolve easily in water

Question 12

What’s happens when ionic compounds melt/dissolve

Answer 12

When Ionic compounds melt the ions are free to move and they’ll carry electric current

when ions dissolved in water that I am separate and all free to move in the solution so that carry electric current

Question 13

What’s the overall charge of any ionic compound

Answer 13

0

Question 14

What’s the difference between ionic bonding and covalent bonding

Answer 14

Ionic bonds giveaway electrons whereas covalent bonds share them

Covalent bonds only share electrons from the outer shells

Question 15

What is a simple molecular structure

Answer 15

atoms that form very strong covalent bonds come together to form small molecules of several atoms - weak bonds

Question 16

What are the properties of simple molecular bonds

Answer 16

.low melting point
.low boiling point
.gasses or liquids at room temp
.they don’t conduct electricity

Question 17

What are giant covalent structures

Answer 17

They are macromolecules

these are similar to giant ionic structures except there are no charged ions and all the atoms are bonded together by strong covalent bonds

Question 18

What are the properties of giant covalent structures

Answer 18

.very high melting point
.very high boiling point
.dont conduct electricity

Question 19

What are the main examples of giant covalent structures

Answer 19

Diamond and graphite and silicone dioxide

Question 20

What are metallic structures

Answer 20

Metallic bonds involve the all-important free electrons with Chris all the properties of metals this delocalise elytron is come from the outer shells of metal atom

Question 21

What are alloys

Answer 21

Mixtures of metals

Question 22

What are the properties of metallic structures

Answer 22

.good conductors of heat
.good conductors of electricity
.can be bent into shape

Question 23

How do you find out the atomic number

Answer 23

The number of protons

Question 24

What’s a smart material

Answer 24

Material that he’s differently depending on the conditions e.g. temperature

Question 25

What is a good example of a smart material

Answer 25

Nitinol - material that bends and then when heated goes back to original shape

Question 26

What are nano particles

Answer 26

Nano particles are really tiny particles

Question 27

What do nano particles include

Answer 27

Fullerenes These molecules of carbon Shaped like hollow balls or close tubes the carbon atoms are arranged in hexagonal rings different fullerenes contain different numbers of comments

Question 28

What are some examples of nano material use

Answer 28

Industrial catalysts 
Sensors 
Building materials 
Sun cream/deodorant 
Nano medicines
Lubricant for cars 
Electricity circuits

Question 29

How do weak polymers work

Answer 29

Thermo softening polymers don’t have cross lining between chains this means the forces between the chains are very easy to overcome - so they melt easily and when it cools it cools into a new shape (can be done as many times as you like

Question 30

How do strong polymers work

Answer 30

Thermosetting polymers have cross-links please hold the change together a solid structure this means the polymer doesn’t suffer and when it is heated and these polymers are strong hard and rigid