Chemistry 1a
Chemistry 1b
Chemistry 1c
Chemistry 1d
Periodic Table
100

The smallest part of an element that can exist

What is an atom?

100

10-10m

What is the radius of an atom?

100

Atoms with different numbers of neutrons

What is an isotope?

100

It has isotopes with mass 12, 13 and 14

What is carbon?

100
They get more reactive as you go down the group

What are the alkali metals?

200

It is because there are the same number of protons and electrons

Why are atoms neutral?

200

10-14m

What is the radius of a nucleus?

200

Two or more different atoms chemically combined together

What is a compound?

200

It has isotopes with mass of 235 and 238

What is a uranium?

200

They get more reactive as you go up the group

What are the halogens?

300

Particles with tiny mass and a negative charge

What are electrons?

300
1 billionth of a metre

What is a nanometre?

300

35.5

What is the mass number of chlorine?

300

63.5

What is the mass of chlorine?

300

Elements with a full outer shell

What are the noble gases?
400

Particles with Mass 1 and Charge 0

What are neutrons?

400

Also called the atomic number

What is the proton number?

400

It has a mass number of 12 and a proton number of 6.

What is carbon?

400

About 120 different ones

How many elements are there?

400

He put together the 1st proper periodic table

Who was Mendeleev?

500

Particles with Mass 1 and Charge +

What is a proton?

500

The number of protons and neutrons

What is the mass number?

500

The only element without neutrons

What is a hydrogen?

500

You take the proton number away from the mass number

How do you find the number of neutrons?

500

He discovered the electron and came up with the plum pudding model (NOT ON SHEET)

JJ Thompson

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