unit 4 review

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

electron affinity

Answer 2

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

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

Question 3

electronegativity

Answer 3

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

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

Question 4

ionization energy

Answer 4

energy it takes to remove electrons from an atom

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

Question 5

s block

Answer 5

G1-2
-chemically reactive metals

Question 6

p block

Answer 6

G13-18

Question 7

d block

Answer 7

G3-12

Question 8

what makes up the s block?

Answer 8

-alkali metals in G1
-alkaline earth metals in G2

Question 9

what makes up the p block?

Answer 9

-halogens in G17
-noble gases in G18

Question 10

what makes up the d block?

Answer 10

-transition metals
(good conductors)

Question 10

what makes up the f block?

Answer 10

lanthanides and actinides

Question 11

what are the most reactive nonmetals?

Answer 11

halogens

Question 12

what are the most reactive metals?

Answer 12

alkali metals

Question 13

what are the least reactive nonmetals?

Answer 13

noble gases

Question 14

what group do lanthanides have similar characteristics and reactivity to?

Answer 14

alkaline earth metals

Question 15

what block is more reactive than d-block

Answer 15

s block