The basics

HideShow resource information
  • Created by: Amy
  • Created on: 22-01-14 17:08
What did Dalton notice about chemicals reacting?
They always reacted in the same relative amount
1 of 13
What did Dalton conclude?
Every element is made of its own distinctive pattern and other chemicals are made from atoms that have joined in a similar way
2 of 13
What is an element?
A chemical made from 1 type of atom which cannot be broken down
3 of 13
What is a compound?
Chemicals made from 2 or more types of atoms
4 of 13
Describe hydrogen
An element that is a colourless gas and flammable
5 of 13
Describe oxygen
An element that is a colourless gas, other substances burn well with oxygen
6 of 13
What happens if you MIX hydrogen and oxygen?
They will still be hydrogen and oxygen. The atoms are not joined together
7 of 13
What happens if you add a flame to the mixing of hydrogen and oxygen?
A chemical reaction takes place, producing the compound water. The atoms are joined together by the energy supplied by the heat
8 of 13
What kind of bond is between hydrogen and oxygen? What kind of reaction?
Covalent bond and endothermic reaction
9 of 13
What do all elements try to achieve when bonding?
A full outershell, like a noble gas
10 of 13
Describe why sodium chloride is safe to eat
Because it is stable and their characteristics have changed, whereas if they have not been chemically bonded sodium and chlorine on their own are very dangerous and reactive
11 of 13
Name 2 way you can separate compounds
Electrolysis and thermal decomposition
12 of 13
What is an isotope?
Different atomic forms of the same element - same number of protons, different number of neutrons.
13 of 13

Other cards in this set

Card 2

Front

What did Dalton conclude?

Back

Every element is made of its own distinctive pattern and other chemicals are made from atoms that have joined in a similar way

Card 3

Front

What is an element?

Back

Preview of the front of card 3

Card 4

Front

What is a compound?

Back

Preview of the front of card 4

Card 5

Front

Describe hydrogen

Back

Preview of the front of card 5
View more cards

Comments

No comments have yet been made

Similar Chemistry resources:

See all Chemistry resources »See all Atoms and compounds resources »