Groups of the periodic table Flashcards
Group 1
Alkali metals
Group 0
noble gases
Group 7
halogens
Why is group 1 (alkali metals) reactive
they need to lose one outer electron to complete their outer shell
Why isn’t group 0 (noble gases) reactive
they have a complete outer shell
Why is group 7 (halogens) reactive
they need to gain an electron to complete their outer shell
Which is more reactive lithium or sodium, why
sodium is more reactive because the outer electron is further away from the positive nucleus meaning the electrostatic attraction is weaker and the outer electron is easier to lose so it is more reactive
Which is more reactive fluorine or chlorine, why
fluorine is more reactive because the electron outside the shell is closer to the positive nucleus meaning the electrostatic attraction is stronger and the electron is pulled easily into the outer electron shell
Which of the periodic groups have a stable electronic structure
group 0 (noble gases) as it has a complete outer shell
Group 0 elements physical properties
boiling point increases as you go down the group, non-flammable, colourless gases at room temp, poor conductors of heat and electricity
Why do group 0 elements not conduct heat
there are no delocalised electrons to transfer heat energy
Group 1 elements chemical properties
more reactive as you go down the group
