C2 - Periodic Table Flashcards
who created the periodic table
John Dalton
how did John dalton arrange his table of elements
by atomic weight
how did John Newlands arrange the elements in his periodic table
by the law of octives, every eight element has similar properties
what is group 1 called
Alkali metals
what are the properties of alkali metals
- relatively low melting point
- very reactive
- compounds are white
- soft and can be cut with a knife
- low density and some float on water
- react with water forming an alkaline solution and hydrogen
- forms 1+ ions
what is group 7 called
Halogens
how do Halogens react with hydrogen
they form convalent compounds known as hydrogen halides
how do Halogens react with metals
to form ionic compounds known as metal halid salts
what is group 0 called
Noble gases
what is the properties of transition metals
- they form coloured compounds
- have ions with different charges
- acts as a catalyst
- conducts electricity and heat
- strong and hard
- shiny
- high density than group 1
- reaction with oxygen: less reactive
- have a full outer shell
what are the properties of metals
- durable
- shiny
- strong/ducticle
- soluble
- thermal conductor
- conducts electricity
what are the properties of non-metals
- not durable
- not manuble
- brittle
- weak
- dull (not shiny)
- insulating
what is a mole
unit of measurement for amount of substance
what is this method?
gas->liquid
condensation
what is this method?
liquid->solid
freezing
