quiz 12 Flashcards
Give the common name for the group 7 elements
The halogens
Describe the trend in the melting and boiling points for the noble gases
increases down the group
Give the common name for group 0 elements
The noble gases
Explain why potassium is more reactive than lithium
it has more shells/electrons
it has a weaker attraction from the nuvleus to the outer shell
it is easier to lose the outer shell electron
Name the product of a reaction between an alkali metal and chlorine
a metal chloride
Describe the trend in the reactivity of the halogens
increases down the group
Explain why sodium is less reactive than potassium
it has fewer shells/electrons
it has a stronger attraction from the nucleus to the outer shell
it is harder to lose outer electron
Explain why bromine is less reactive than chlorine
it has more shells/electrons
it has a weaker attraction from the nucleus to the outer shell
it is harder to gain an outer shell electron
In terms of electrons, describe what group 0 elements have in common
A full outer shell
Give the state of fluorine at room temperature
Gas
Explain why the following reaction does not proceed: KBr+ I2
iodine is less reactive than bromine so cant displace it from potassium bromide
A sample of potassium is heated and burned in oxygen. Give 2 observations seen during the reaction
a lilac flame is produced
The potassium melts
Explain why the group 1 elements are called alkali
metals
They are metals that react with water to form alkalis
Define inert
unreactive
In terms of electrons, describe what group 7 elements have in common
seven electrons in the outer shell
Give the state of iodine at room temperature
solid
State the typical observations when an alkali metal is added to water
fizzing
the alkali metal moves on the surface of the water
the alkali metal decreases in size
if potassium, a lilac flame is produced
Give the state of chlorine at room tempreature?
gas
Give the common name for the group 1 elements
alkali metals
Explain why potassium bromide can react with chlorine
chlorine is more reactive than bromine, so can displace it from potassium bromide
