Question 1

Which of the following correctly describes subatomic particles? 1. Mass:     <   = n
2. Magnitude of charge:   n   =   3. Location:   outside nucleus     ,     , inside nucleus     n

Accepted Answer

A) 1 only 
B) 2 only 
C) 3 only 
D) 1 and 2 
A) 1 only 
B) 2 only 
C) 3 only 
D) 1 and 2

Question 2

​ Which of the following units is the relative mass of a molecule expressed in atomic mass units and is calculated by adding together the atomic weights of the atoms in the molecule?

Accepted Answer

A) Atomic number 
B) mass number 
C) Mass number 
D) Atomic weight 
A) Atomic number 
B) mass number 
C) Mass number 
D) Atomic weight

Question 3

What is wrong with the following molecular formula: SOO (sulfur dioxide)?

Accepted Answer

A) OSO is the correct form 
B) SO should be So 
C) OO should be written as O2 
D) OO should be written as O2 
A) OSO is the correct form 
B) SO should be So 
C) OO should be written as O2 
D) OO should be written as O2

Question 4

How many neutrons are in an atom that has a mass number of 75 and contains 35 protons?

Accepted Answer

A) 40 
B) 35 
C) 75 
D) can't tell 
A) 40 
B) 35 
C) 75 
D) can't tell

Question 5

​Which of the following units can be used to collect a sample of atoms of one element with a mass in grams equal to the atomic weight of another element? ​

Accepted Answer

A) Molecular weight 
B) Avogadro's number 
C) Atomic number 
D) Atomic mass 
A) Molecular weight 
B) Avogadro's number 
C) Atomic number 
D) Atomic mass

Question 6

is the form of uranium used to make atomic bombs.  One atom of this isotope consists of ___.

Accepted Answer

A) 92 protons, 92 electrons, 92 neutrons 
B) 92 protons, 143 electrons, 92 neutrons 
C) 92 protons, 92 electrons. 143 neutrons 
D) 143 protons, 143 electrons, 92 neutrons 
A) 92 protons, 92 electrons, 92 neutrons 
B) 92 protons, 143 electrons, 92 neutrons 
C) 92 protons, 92 electrons. 143 neutrons 
D) 143 protons, 143 electrons, 92 neutrons

Question 7

One mole of O3 weighs 16 grams.

Accepted Answer

A) True 
 B)False

Question 8

One mole of any substance will contain one Avogadro's number of atoms of that substance.

Accepted Answer

A) True 
 B)False

Question 9

What is the mass number of a carbon-13 (13C)atom?

Accepted Answer

A) 13 
B) 12 
C) 6 
D) 7 
A) 13 
B) 12 
C) 6 
D) 7

Question 10

A diet is planned for a trip on a space ship and is lacking in milk, but is rich in turnips and broccoli. Such a diet could provide a sufficient amount of calcium for adults.

Accepted Answer

A) True 
 B)False

Question 11

Calcium supplements can be taken in 1,000 mg increments.

Accepted Answer

A) True 
 B)False

Question 12

The symbols for all of the elements are derived from the Latin names.

Accepted Answer

A) True 
 B)False

Question 13

One mole of an element would weigh the same as a mole of an isotope of the same element.

Accepted Answer

A) True 
 B)False

Question 14

A mole of copper contains the same number of atoms as a mole of zinc.

Accepted Answer

A) True 
 B)False

Question 15

If calcium carbonate found in limestone is 40.0% calcium, how many grams of calcium are in 485 g of calcium carbonate?

Accepted Answer

A) 12.1 g of calcium 
B) 291 g of calcium 
C) 19,400 g of calcium 
D) 194 g of calcium 
A) 12.1 g of calcium 
B) 291 g of calcium 
C) 19,400 g of calcium 
D) 194 g of calcium

Question 16

How many electrons are found around the species below?

Accepted Answer

A) -2 
B) 0 
C) 2 
D) 4 
A) -2 
B) 0 
C) 2 
D) 4

Question 17

Refer to a periodic table and tell how many helium atoms (He)would be needed to get close to the same mass as an average oxygen atom (O).

Accepted Answer

A) six 
B) four 
C) twelve 
D) one-fourth 
A) six 
B) four 
C) twelve 
D) one-fourth

Question 18

A scanning tunneling microscope (STM)relies on a very strong light source to help see atoms.

Accepted Answer

A) True 
 B)False

Question 19

One mole of an element would weigh the same as a mole of an isotope of the same element.

Accepted Answer

A) True 
 B)False

Question 20

Atoms that have the same atomic number but differ by mass number are called?

Accepted Answer

A) protons 
B) neutrons 
C) isotopes 
D) positrons 
A) protons 
B) neutrons 
C) isotopes 
D) positrons

Exam 2: Atoms and Molecules

Which of the following correctly describes subatomic particles? 1. Mass: < = n 2. Magnitude of charge: n = 3. Location: outside nucleus , , inside nucleus n

​ Which of the following units is the relative mass of a molecule expressed in atomic mass units and is calculated by adding together the atomic weights of the atoms in the molecule?

What is wrong with the following molecular formula: SOO (sulfur dioxide)?

How many neutrons are in an atom that has a mass number of 75 and contains 35 protons?

​Which of the following units can be used to collect a sample of atoms of one element with a mass in grams equal to the atomic weight of another element? ​

is the form of uranium used to make atomic bombs. One atom of this isotope consists of ___.

One mole of O3 weighs 16 grams.

One mole of any substance will contain one Avogadro's number of atoms of that substance.

What is the mass number of a carbon-13 (13C)atom?

A diet is planned for a trip on a space ship and is lacking in milk, but is rich in turnips and broccoli. Such a diet could provide a sufficient amount of calcium for adults.

Calcium supplements can be taken in 1,000 mg increments.

The symbols for all of the elements are derived from the Latin names.

One mole of an element would weigh the same as a mole of an isotope of the same element.

A mole of copper contains the same number of atoms as a mole of zinc.

If calcium carbonate found in limestone is 40.0% calcium, how many grams of calcium are in 485 g of calcium carbonate?

How many electrons are found around the species below?

Refer to a periodic table and tell how many helium atoms (He)would be needed to get close to the same mass as an average oxygen atom (O).

A scanning tunneling microscope (STM)relies on a very strong light source to help see atoms.

One mole of an element would weigh the same as a mole of an isotope of the same element.

Atoms that have the same atomic number but differ by mass number are called?

Matter, Measurements, and Calculations

Electronic Structure and the Periodic Law

Forces Between Particles

Chemical Reactions

The States of Matter

Solutions and Colloids

Reaction Rates and Equilibrium

Acids, Bases, and Salts

Radioactivity and Nuclear Processes

Organic Compounds: Alkanes

Unsaturated Hydrocarbons

Alcohols, Phenols, and Ethers

Aldehydes and Ketones

Carboxylic Acids and Esters

Amines and Amides

Carbohydrates

Lipids

Proteins

Enzymes

Nucleic Acids and Protein Synthesis

Nutrition and Energy for Life

Carbohydrate Metabolism

Lipid and Amino Acid Metabolism

Body Fluids

Filters

Which of the following units is the relative mass of a molecule expressed in atomic mass units and is calculated by adding together the atomic weights of the atoms in the molecule?

Which of the following units can be used to collect a sample of atoms of one element with a mass in grams equal to the atomic weight of another element?

One mole of O₃ weighs 16 grams.

What is the mass number of a carbon-13 (¹³C)atom?