C1

Question 1

The nuclear model

Answer 1

• It contains ‘proton’ & ‘neutrons’

- Has a radius of around 1/10000

Question 2

What does a atom consits of?

Answer 2

Electron
Nutron
Proton
Nucleus

Question 3

What are the:
- Electrons
- Protons
- Nutrons
And their relative Mass/Charge

Answer 3

Electron - very small Mass, -1 Charge
Proton - 1 Mass, +1 Charge
Nutrons - 1 Mass, 0 Charge

Question 4

The Atomic number & Mass number

Answer 4

• Atomic number - the number of protons (on bottom)

- Mass number - number of protons + number nutrons (on top)

Question 5

What are the :

• Periods
• Groups
• PCP(Predicting Charge Properties)

Answer 5

Periods - Elements with similar propertise ocuring at regular intervals

Groups - Elements in same column, have the same number of electrons in outer shell

PCP - Due to all elements in a colum have the same number of elements in the outer shell (all will react at the same time)

Question 6

What are molecules

Answer 6

2 or more different atoms held together by chemical bonds

An example is ‘water’ Co2

Question 7

What are Compounds

Answer 7

• 2 or more different elements held together by chemical bonds
• There can be millions or trillions of atoms, like salt for example

Question 8

What is a formula

Answer 8

• It consits of huge structurs containing millions to billions of atoms, like salt
• There are ‘Ionic bonds’ to bulid large substances ( they arn’t counted as Molecules)
• If one were to have billions of atoms, then the other would have the same

Question 9

Calculating ‘relitive atomic masses’

Answer 9

• Relitive atomic mass (Ar) = sum of (isotope abundunce x Isotope mass number) / Isotope abundance