CHEM1315 Study Night 1

Question 1

#10: True or False: Protons and neutrons have approximately equal masses.

Accepted Answer

True

Question 2

#2: Anions are always larger than their parent atoms, and cations are always smaller than their parent atoms.

Accepted Answer

True

Question 3

#17: What are the possible values of l if n=3?

Accepted Answer

0, 1, 2

Question 4

#6: True or False: Isotopes have the same number of protons but a different number of electrons.

Accepted Answer

False

Question 5

#11: Waves that are out of phase demonstrate ______ interference.

Accepted Answer

destructive

Question 6

#9: Look at the following isotopic symbol. How many electrons are there?

Accepted Answer

10

Question 7

#13: True or False: The brightness of light depends on amplitude, while the color of light depends on wavelength.

Accepted Answer

True

Question 8

#8: Look at the following isotopic symbol. How many neutrons are there?

Accepted Answer

12

Question 9

#5: In a chemical reaction, matter can neither be created nor destroyed. This is known as ______________.

Accepted Answer

The Law of Conservation of Mass

Question 10

#14: When electrons transition from a lower energy level to a higher energy level, energy is _________.

Accepted Answer

absorbed

Question 11

#15: True or False: A wave with a longer wavelength has higher energy.

Accepted Answer

False

Question 12

#20: Which one of the following electron configurations is incorrect?

Accepted Answer

Cu: [Ar]3d94s2

Question 13

#21: Which of the following is an isoelectronic series?

Accepted Answer

Ar, Cl-, S2-, Ca2+

Question 14

#19: Electrons will not pair up if an empty orbital at the same energy level is available. This is known as _____.

Accepted Answer

Hund's Rule

Question 15

#12: Wavelength and frequency are ________ related.

Accepted Answer

inversely

Question 16

#18: Which set of quantum numbers is possible?

Accepted Answer

n = 3, l = 1, ml = -1, 0, 1, ms = +1/2

Question 17

# 1: How many significant figures are in this number? 20.010

Accepted Answer

5

Question 18

#4: Group 2A elements are also called the ________.

Accepted Answer

Alkaline Earth Metals

Question 19

#3: Oxygen wants to form an ion. What is it most likely to do?

Accepted Answer

gain 2 electrons and become O2-

Question 20

#7: Look at the following isotopic symbol. What is the atomic number?

Accepted Answer

11

Question 21

#16: Which quantum number defines the shape of an electron orbital?

Accepted Answer

l. the angular momentum quantum number

Questions 21