C2-the periodic table Flashcards
1
Q
physical properties of a element
A
describe how a substance behaves generally
2
Q
chemical properties of an element
A
describe how a substance behaves in terms of its chemical reactions
3
Q
columns are called
A
groups
4
Q
rows are called
A
periods
5
Q
metals are:
A
- normally good conductors of heat and electricity
- shiny when cut
- malleable
- dense and sonorous
- most have high melting points
6
Q
non-metals are:
A
- often have properties the opposite of metals
- low boiling points (so are gases at room temperature)
- poor conductors of electricity and heat
- dull in appearance
- low density
- brittle and not sonorous
7
Q
group 0 are called:
A
noble gases
8
Q
group 0 are:
A
- very unreactive
- low boiling points
- their boiling points increase down the group
9
Q
group 1 are called:
A
alkali metals
10
Q
group 1 are:
A
- very reactive
- react strongly with water
- get more reactive as you go down the group
- low melting points (that most metals)
- melting points decrease down the group
- always produce a metal hydroxide and hydrogen gas when reacted with water
11
Q
group 7 are called:
A
halogens
12
Q
group 7 are:
A
- very reactive
- the opposite of group 1
- melting point increases down the group
- reactivity decreases down the group
- an element from higher up the group takes the place of one from lower down the group in a compound (displacement reactions)
