Midterm semester 1

Question 1

Order of states of matter triangle

Answer 1

A- Sublimation
B- Deposition
C- Condensation
D- Vaporization
E- Melting
F- Freezing

Question 2

Describe the Law of Conservation of mass.

Answer 2

In a chemical reaction matter is neither created nor destroyed. (only changed in form)

Question 3

How to find density?

Answer 3

mass/volume

Question 4

What’s the density of the wood?

Answer 4

.85 g c/m^3

Question 5

What is the heating curve of water chart?

Answer 5

1. Solid
2. Melting/ heat of fusion
3. Liquid
4. Boiling point/ heat of vaporization
5. gas

Question 6

What is 42K on chart?

Answer 6

19 42 19 23 19 alkali metals

Question 7

What’s 25. on the chart?

Answer 7

5B 2 5 2 Noble gases

Question 8

What’s 26. on the chart?

Answer 8

127I 53 74 53 halogens

Question 9

What’s the blocks mass?

Answer 9

.22 g

Question 10

Cations are…

Answer 10

positive/ loses

Question 11

Anions are…

Answer 11

negative/ gains

Question 12

____ bonds form when elements share electrons

Answer 12

Covalent

Question 13

_____ compounds the strongest

Answer 13

ionic

Question 14

______ compounds usually solid

Answer 14

ionic

Question 15

Strontium has

Answer 15

5 rings
38 valance electrons