Unit 1- Trends in the periodic table

Question 1

Describe atomic radius trend

Answer 1

-increases going down and left
*remember periods=shells

–> moving down a period, youre adding more energy levels since there are more e-
–> every element moving right in a period has 1 more proton than the last, creating a strong attraction pulling radius tighter

Question 2

Describe ionic radius

Answer 2

-increases right up and right
*Remember ions are gaining or loosing e-
*e- repels eachother, therefor adding will make bigger, taking away will make smaller

Question 3

what is ionization ENERGY

Answer 3

energy required to REMOVE a valence electron

Question 4

describe ionization energy trend

Answer 4

-increases moving up & right

–>when electrons are in the same period, it is easier to remove an electron the further it is from the nucleus (higher energy level) since it has less of a pull

Question 5

what is electron AFFINITY

Answer 5

how much an atom wants to gain an electron

Question 6

describe electron affinity trend

Answer 6

-increases up & right
*decreases down a period because they are more energy levels that are sheilding the positive nucleus

–>metals don’t want to gain electrons, they want to loose

–>non-metals want to gain electrons

Question 7

what is electronegativity

Answer 7

ability of an atom to hold electrons tightly

Question 8

describe electronegativity trend

Answer 8

-increase up & right

-you want to electrons as close to the nucleus as possible ex:F