4.2 vocab

Question 1

atomic radius

Answer 1

• 1/2 the distance between 2 nuclei of identical atoms bonded together

-periods decrease left to right
-groups increase top to bottom

THE ONLY DIFFERENT TREND

Question 2

ionization energy

Answer 2

• energy it takes to remove electrons from an atom

-periods increase left to right
-groups decrease top to bottom

Question 3

electron affinity

Answer 3

the energy change that occurs when an electron is added to an atom

-periods increase left to right
-groups decrease top to bottom

Question 4

electronegativity

Answer 4

the measure of the ability of an atom in a compound to attract an electron from another