PATTERNS IN THE PERIODIC TABLE Flashcards
Describe the trend in melting and boiling points in the halogens
Increases down the group
Give the state of Bromine at room temperature
Liquid
Inert
Unreactive
Name the product of a reaction between an alkali metal and chlorine
Metal chloride
In terms of electrons, describe what group 7 elements have in common
7 electrons in the outer shell
In context of elements and the Periodic Table , define trend
A pattern in properties
Explain why Bromine is less reactive than chlorine
Bromine has more shells / electrons
The outer shell is further from the nucleus
It has a weaker attraction from the nucleus to the outer shell
It’s harder to gain an outer shell electron
Common name for group 0 elements
Noble gases
Describe the trend in reactivity of the halogens
Decreases down the group
Explain why the melting and boiling points of the halogens increase down the group
The molecules increase in size
The intermolecular forces become stronger
Which require more energy to overcome
Describe the trend in reactivity of the alkali metals
Increases down the group
Give the state of chlorine at room temperature
Gas
Explain why the noble gases are inert
They have full outer shells , so they do not need to gain or lose electrons
In terms of electrons, explain what alkali metals have in common
One electron in the outer shell It’s harder
Give the state of iodine at room temperature
Solid
Explain why Group 1 elements are called alkali metals
They are metals that react with water to from alkalis
State the typical observations when an alkali metal is added to water
Fizzing
The alkali metal moves on the surface of the water
Alkali metal decreases in size
If Potassium , a lilac flame is produced
Give the common name for the group 7 elements
The halogens
Explain why halogens are considered diatomic
They are made of 2 atoms bonded together in a small molecule
Explain why Potassium is more reactive than lithium
Potassium has more shells/electrons
The outer shell is further from the nucleus
It has a weaker attraction from the nucleus to the outer shell
It’s easier to lose the outer shell electron
