Midterm

Question 1

What happens at an atomic/molecular level when….

1. Water freezes to form ice
2. copper and tin combine to form bronze
3. rainwater evaporates from the pavement

Answer 1

1. low temp causes atoms to slow and get closer together
2. metallic bond(sharing electrons)
3. high temp causes atoms to move far apart and fast enough to change state and break surface tension

Question 2

How are nuclear symbols set up?

Answer 2

Mass
Element
Protons

Question 3

What colors go with what ions?

Purple, blue/green, green/violet, faint pink/violet, green, yellow/green, blue, pink

Answer 3

Purple: Ti
Blue/Green: Cu
Green/Violet: Vanadium
Faint pink/violet: manganese
Green: Nickel
Yellow/green: Fe
Blue: Vanadium
Pink: Co

Question 4

When naming, which bonds do you need roman numerals? which bonds do you need to keep track of charges?

Answer 4

ionic

Question 5

How are prefixes with ionic and covalent bonds different?

Answer 5

All words have prefixes with covalent bonds, the first ones dont with ionic bonds

Question 6

How different strength acids/bases translate into electrolytes?

Answer 6

Strong acids or bases, ionic substances=strong electrolytes

Covalent=nonelectrolyte

Weak acid/base= weak electrolyte

Question 7

How do you tell if something is oxidized or reduced?

Answer 7

Gain electrons: reduced

Lose electrons: Oxidized

Question 8

How do you tell if a reaction is redox?

Answer 8

Something gets oxidized AND something gets reduced

Question 9

How do you tell which molecules have higher melting points?

Answer 9

More mass=higher melting point

Question 10

What are the strong acids?

Answer 10

1. HI
2. HBr
3. HClO4
4. HCl
5. HClO3
6. H2SO4
7. HNO3

Question 11

What are the strong bases?

Answer 11

1. NaOH
2. KOH
3. LiOH
4. RbOH
5. CsOH
6. Ca(OH2)
7. Ba(OH2)
8. Sr(OH2)