periodic table trends

Question 1

describe the size trends of the periodic table

Answer 1

the more right = smaller
the more down = bigger

Question 2

why does atomic size increase from top to bottom

Answer 2

it increases from top to bottom since, a new energy level is added every time we go down a group

Question 3

why does atomic size decrease from left to right

Answer 3

electrons are pulled in more tightly as protons increase

Question 4

when does metals become more reactive

Answer 4

more down = increased metal reactivity
more left = increased metal reactivity

Question 5

when does non-metals become more reactive

Answer 5

more right = increased non-metal reactivity
more down = increased non-metal reactivity

Question 6

why are large metal atoms more reactive

Answer 6

larger atoms loose electrons more easily, so they are more reactive

Question 7

why are small non-metal atoms more reactive

Answer 7

smaller atoms attract electrons more easily, so they are more reactive

Question 8

ionisation energy

Answer 8

Ionisation energy is the energy required to remove an electron from the outer energy level of an atom.

Question 9

Electronegativity

Answer 9

Electronegativity is the ability of an atom to gain electrons.

Question 10

what is oxidation

Answer 10

An element that has undergone oxidation has gained electrons.
Generally non-metals oxidise.

Question 11

what is reduction

Answer 11

An element that has undergone reduction has gained electrons.
Generally non-metals reduce.