periodic table Flashcards
1
Q
alkali reactions with oxygen
A
form oxides, white solids that are soluble in water to give alkaline solutions
2
Q
alkali metal trends
A
- m.p decreases down the group
- reactivity increases down the group
- density increases down the group
3
Q
halogen trends
A
- diatomic molecules
- low m.p and b.p
- non-conductor of heat and electricity
- more soluble in organic substances than water
- density increases down the group
- reactivity decreases down the group
4
Q
halogen appearance
A
iodine- grey-black solid
chlorine- pale yellow-green gas
bromine- red-brown liquid
5
Q
displacement reaction
A
a more reactive halogen will displace another less reactive halogen that is in solution as a halide ion
6
Q
transition metal properties
A
- high m.p
- hard
- more dense than group 1 and 2
- form coloured compounds
- good catalysts
- good heat and electricity conductors
- malleable and ductile
- less reactive than group 1 and 2
- form more than one type of ion as they have multiple oxidation states
7
Q
general periodic table trends
A
- full outer shell makes atom stable
- density increases down the groups
8
Q
define monoatomic
A
only contains one atom
9
Q
which 2 gases are used for light bulbs
A
neon and argon
10
Q
helium uses
A
- balloons
- LCD panels
11
Q
argon uses
A
- lights
- fire extinguishers
12
Q
neon uses
A
- lasers
- vacuum tubes
13
Q
xeon uses
A
- lamps
- projectors
14
Q
noble gases properties
A
- low b.p and m.p
- density increases down the group
- unreactive
- colourless
-monoatomic
15
Q
why do noble gas densities increase?
A
atoms get larger therefore intermolecular forces get larger
