Atoms are the smallest particle of an _________ that can exist
Element.
What are protons, neutrons and electrons?
Subatomic particles
What are protons and neutrons called?
Nucleons
Where are the protons and neutrons found
In the nucleus
What are the properties of subatomic particles
Mass and charge
What are atoms held together by
Electrostatic forces
How do you calculate relative atomic mass?
Ar = (m1x1 +m2x2 ……+mn xn )/100
What does the period represent?
Number of shells
What does the group represent?
The number of electrons in the outer shell
What is group 0 known as?
Noble gases
What is the noble gases appearance?
Clear, colourless, odourless gases at room temperature
Are the Noble gases reactive?
Not really and they are innert
Do the noble gases form compounds?
Helium and neon form no compounds where is the rest still do form a few.
How much of the atmosphere is argon make up?
1%
Why are the noble gases inert (chemically unreactive)?
They have a full outer shell
Are metals conductors or insulators?
Conductors
What are the oxide generally for metals?
Basic
What are the oxides generally for nonmetals?
Acidic
Acid react with bases in_____________ reactions
Neutralisation
