Lecture 16

Question 1

ionic transition metal oxides(oxidation number +1 to +3) are____

Answer 1

basic

so they will react with aqueous acids to form solutions of salts and water

Question 2

oxides with oxidation numbers of +5-+7 tend to be ______

Answer 2

acidic

react with solutions of hydroxide ions to form salts and water

Question 3

oxides with +4 oxidation numbers are generally

Answer 3

amphoteric(behave as either acids or bases)

Question 4

most non-metals tend to be ___ _____

Answer 4

acidic oxides

Question 5

as you go down the group, the atomic number of alkali metals ______

Answer 5

increases

Question 6

how do the alkali metals’ properties change

Answer 6

decreasing melting point, densities increase, become softer, more reactive, ionization decreases

Question 7

compared with alkali metals, alkaline earth metals are typically

Answer 7

harder, more dense, melt at higher temperatures

Question 8

what are the two different forms of oxygen called

Answer 8

allotropes

Question 9

properties of the noble gases

Answer 9

non metals, colorless, monatomic, non reactive