1.1 - Atoms, elements and compounds Flashcards
1
Q
Roughly, how many different elements are there?
A
About 100
2
Q
What are all substances made from?
A
Elements
3
Q
What is the periodic table?
A
A list of all the elements
4
Q
What is each element made from?
A
One type of atom
5
Q
How are the atoms represented on the periodic table?
A
Chemical symbols
6
Q
What are the columns on a periodic table called?
A
Groups
7
Q
What do elements in a group usually have?
A
Similar properties
8
Q
What are the rows on a periodic table called?
A
Periods
9
Q
Simply, what happens when elements react?
A
Their atoms join with atoms of other elements
10
Q
What are compounds composed of?
A
Two or more elements combined together
