1. What information about an element does each letter represent?
Question #1
What information about an element does each letter represent?
Answers:
A: atomic number (# of protons) C: symbol
D: name E: atomic weight (protons and neutrons)

2. Symbol: C atomic # (# of protons): 6
Question #2
What is the chemical symbol and atomic number (# of protons) for carbon?
Answer:
Symbol: C atomic # (# of protons): 6

3. Question #3 Answers: Which element has 15 protons in its nucleus?
A. Phosphorus B. Argon

4. Question #4 Answers: a. gram b. Newton
Which unit would be found on each of the instruments shown below?
triple beam balance b. spring scale
(measures mass) (measures force)
Answers: a. gram b. Newton

5. Question #5 Answers: A: length B: resistance C: energy
Name the variable that each unit is used to measure:
Meter
Ohms
Joule
Answers:
A: length B: resistance C: energy

6. Question #6 a. What is the density of water (at 3.980C)?
b. What is the density of ice?
c. Which is more dense?
Answers:
a. 1.0 g/mL b g/ml c. water

7. Question #7 Answers: A: size B: mixture
Identify 1 safe and 1 unsafe lab practice.
Answers:
A: size B: mixture

8. Question #8
Name the quantity that goes with each formula. (example l x w x h = volume) A. B.
Answers:
a: density b. force

9. A: protons B. protons/ neutrons
Question #9
Complete the following statements:
A. Atomic number is equal to the number of
in an atom.
B. Atomic weight is equal to the number of
plus in an atom.
Answers:
A: protons B. protons/ neutrons