CHEM 101 FINAL EXAM!!! QUESTIONS AND ANSWERS WITH COMPLETE SOLUTIONS 100% CORRECT!!!

CHEM 101 FINAL EXAM!!! QUESTIONS
AND ANSWERS WITH COMPLETE
SOLUTIONS 100% CORRECT!!!
Question: If an uncharged, neutral atom contains 30 protons and 34 neutrons
within its nucleus, how many electrons does it possess orbiting the nucleus?
 A. 30
 B. 32
 C. 34
 D. 64
 E. 94
Answer: ✔✔ A. 30 (Note: In any neutral atom, the number of negatively charged
electrons perfectly matches the number of positively charged protons).


Question: Which of the following elements belongs to the noble gas family on the
periodic table?
 A. Oxygen
 B. Helium
 C. Chlorine
 D. Gold
 E. Nitrogen
Answer: ✔✔ B. Helium


Question: What phase transition occurs when high-energy molecules break free
from the surface of a liquid and enter the gas phase?
 A. Deposition
 B. Evaporation

,  C. Melting
 D. Boiling
 E. Sublimation
Answer: ✔✔ B. Evaporation


Question: Which of the following units is used exclusively to measure mass
within the metric system?
 A. Milliliter
 B. Kilogram
 C. Meter
 D. Celsius
 E. Centimeter
Answer: ✔✔ B. Kilogram


When solid is converted directly to a gas, the change of state is called


A. sublimation
B. condensation
C. boiling
D. melting
E. freezing - ANSWER.....A. sublimation


Which of the following is an example of a physical change?


A. digesting a cheeseburger
B. burning coal