Question 1

Match the following.
-potassium

Accepted Answer

A) Mg 
B) Fe 
C) Si 
D) K 
E) C 
A) Mg 
B) Fe 
C) Si 
D) K 
E) C

Question 2

An atom that has an atomic number of 20 and a mass number of 42 is an isotope of an atom that has ________.

Accepted Answer

A)  an atomic number of 21 and a mass number of 42 
B)  an atomic number of 20 and a mass number of 40 
C)  22 neutrons and 20 protons 
D)  22 protons and 20 neutrons 
A)  an atomic number of 21 and a mass number of 42 
B)  an atomic number of 20 and a mass number of 40 
C)  22 neutrons and 20 protons 
D)  22 protons and 20 neutrons

Question 3

If 3.6 g of chlorine combines with sodium to make 6.0 g of sodium chloride, what mass of sodium is required?

Accepted Answer

A)  3.6 g 
B)  2.4 g 
C)  6.0 g 
D)  9.6 g 
E)  1.2 g 
A)  3.6 g 
B)  2.4 g 
C)  6.0 g 
D)  9.6 g 
E)  1.2 g

Question 4

What is the average mass, in grams, of one atom of carbon?

Accepted Answer

A)  5.01 × 10-22 g 
B)  5.01 × 1022 g 
C)  1.38 × 10-25 g 
D)  1.99 × 10-23 g 
E)  1.99 × 1023 g 
A)  5.01 × 10-22 g 
B)  5.01 × 1022 g 
C)  1.38 × 10-25 g 
D)  1.99 × 10-23 g 
E)  1.99 × 1023 g

Question 5

Why do elements in the same group tend to have similar chemical properties?

Accepted Answer

Since elements in the same group have th

Question 6

Which of the following statements is FALSE?

Accepted Answer

A)  Atoms are composed of protons, neutrons, and electrons. 
B)  The number of protons in the nucleus of an atom is equal to its atomic number. 
C)  Atoms that have lost or gained electrons form ions. 
D)  Cations are negatively charged. 
E)  Atomic mass number is equal to the sum of the number of protons and neutrons. 
A)  Atoms are composed of protons, neutrons, and electrons. 
B)  The number of protons in the nucleus of an atom is equal to its atomic number. 
C)  Atoms that have lost or gained electrons form ions. 
D)  Cations are negatively charged. 
E)  Atomic mass number is equal to the sum of the number of protons and neutrons.

Question 7

What is the atomic mass for tin?

Accepted Answer

A)  47.87 
B)  50 
C)  118.71 
D)  22 
A)  47.87 
B)  50 
C)  118.71 
D)  22

Question 8

Match the following.
-silicon

Accepted Answer

A) Mg 
B) Fe 
C) Si 
D) K 
E) C 
A) Mg 
B) Fe 
C) Si 
D) K 
E) C

Question 9

Which of the following elements is a noble gas?

Accepted Answer

A)  Ar 
B)  Br 
C)  N 
D)  O 
E)  K 
A)  Ar 
B)  Br 
C)  N 
D)  O 
E)  K

Question 10

Dalton's atomic theory states ________.

Accepted Answer

A)  that all elements have several isotopes 
B)  that matter is composed of small indestructible particles 
C)  that the properties of matter are determined by the properties of atoms 
D)  that energy is neither created nor destroyed during a chemical reaction 
E)  that an atom is predominantly empty space 
A)  that all elements have several isotopes 
B)  that matter is composed of small indestructible particles 
C)  that the properties of matter are determined by the properties of atoms 
D)  that energy is neither created nor destroyed during a chemical reaction 
E)  that an atom is predominantly empty space

Question 11

When forming an ion, calcium, Ca, will ________ electron(s).

Accepted Answer

A)  gain one 
B)  gain two 
C)  gain three 
D)  lose one 
E)  lose two 
A)  gain one 
B)  gain two 
C)  gain three 
D)  lose one 
E)  lose two

Question 12

Which of the following elements is a gas at room temperature?

Accepted Answer

A)  bromine 
B)  carbon 
C)  helium 
D)  sodium 
A)  bromine 
B)  carbon 
C)  helium 
D)  sodium

Question 13

How many protons does the I- ion possess?

Accepted Answer

A)  52 
B)  54 
C)  4 
D)  7 
E)  53 
A)  52 
B)  54 
C)  4 
D)  7 
E)  53

Question 14

In a 41.5 g sample of carbon, how many atoms have a mass of 12.0107 u?

Accepted Answer

A)  2.08 × 1024 
B)  3.00 × 1026 
C)  12 
D)  1.2 × 1021 
E)  0 
A)  2.08 × 1024 
B)  3.00 × 1026 
C)  12 
D)  1.2 × 1021 
E)  0

Question 15

Identify the number of electrons in P-3.

Accepted Answer

A)  18 
B)  12 
C)  19 
D)  15 
E)  16 
A)  18 
B)  12 
C)  19 
D)  15 
E)  16

Question 16

The number 6.022 × 1023 is known as ________.

Accepted Answer

Question 17

The atomic number is equal to the number of ________.

Accepted Answer

The answer of The atomic number is equal to the...

Question 18

If 8.32 g of copper is mixed with 5.2372 × 10-2 mol of zinc to create the alloy brass, how many metal atoms total are present in the brass?

Accepted Answer

A)  7.88 × 1022 metal atoms 
B)  3.04 × 10-25 metal atoms 
C)  1.10 × 1023 metal atoms 
D)  3.15 × 1022 metal atoms 
E)  3.15 × 10-22 metal atoms 
A)  7.88 × 1022 metal atoms 
B)  3.04 × 10-25 metal atoms 
C)  1.10 × 1023 metal atoms 
D)  3.15 × 1022 metal atoms 
E)  3.15 × 10-22 metal atoms

Question 19

Zinc has five naturally occurring isotopes, Zn-64, Zn-66, Zn-67, Zn-68 and Zn-70. Calculate the atomic mass of zinc given the following abundances and atomic masses for the isotopes: 
Zn-64 63.9291 u 48.61%
Zn-66 65.9260 u 27.9%
Zn-67 66.9271 u 4.1%
Zn-68 67.9248 u 18.75%
Zn-70 69.9253 u 0.62%

Accepted Answer

A)  66.3 u 
B)  65.4 u 
C)  66.7 u 
D)  65.1 u 
E)  64.8 u 
A)  66.3 u 
B)  65.4 u 
C)  66.7 u 
D)  65.1 u 
E)  64.8 u

Question 20

What is the element symbol for an atom that has 5 protons and 6 neutrons?

Accepted Answer

A)  B 
B)  C 
C)  H 
D)  Na 
A)  B 
B)  C 
C)  H 
D)  Na

Exam 2: Atoms and Elements

Match the following. -potassium

An atom that has an atomic number of 20 and a mass number of 42 is an isotope of an atom that has ________.

If 3.6 g of chlorine combines with sodium to make 6.0 g of sodium chloride, what mass of sodium is required?

What is the average mass, in grams, of one atom of carbon?

Why do elements in the same group tend to have similar chemical properties?

Which of the following statements is FALSE?

What is the atomic mass for tin?

Match the following. -silicon

Which of the following elements is a noble gas?

Dalton's atomic theory states ________.

When forming an ion, calcium, Ca, will ________ electron(s).

Which of the following elements is a gas at room temperature?

How many protons does the I- ion possess?

In a 41.5 g sample of carbon, how many atoms have a mass of 12.0107 u?

Identify the number of electrons in P-3.

The number 6.022 × 1023 is known as ________.

The atomic number is equal to the number of ________.

If 8.32 g of copper is mixed with 5.2372 × 10-2 mol of zinc to create the alloy brass, how many metal atoms total are present in the brass?

Zinc has five naturally occurring isotopes, Zn-64, Zn-66, Zn-67, Zn-68 and Zn-70. Calculate the atomic mass of zinc given the following abundances and atomic masses for the isotopes: Zn-64 63.9291 u 48.61% Zn-66 65.9260 u 27.9% Zn-67 66.9271 u 4.1% Zn-68 67.9248 u 18.75% Zn-70 69.9253 u 0.62%

What is the element symbol for an atom that has 5 protons and 6 neutrons?

Units of Measurement for Physical and Chemical Change

Molecules, Compounds, and Nomenclature

Chemical Reactions and Stoichiometry

Gases

Thermochemistry

The Quantum-Mechanical Model of the Atom

Periodic Properties of the Elements

Chemical Bonding I: Lewis Theory

Chemical Bonding Ii: Molecular Shapes, Valence Bond Theory, and Molecular Orbital Theory

Liquids, Solids, and Intermolecular Forces

Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases

Aqueous Ionic Equilibrium

Gibbs Energy and Thermodynamics

Electrochemistry

Radioactivity and Nuclear Chemistry

Organic Chemistry I: Structures

Organic Chemistry Ii: Reactions

Biochemistry

Chemistry of the Nonmetals

Metals and Metallurgy

Transition Metals and Coordination Compounds

Filters

How many protons does the I^-ion possess?

Identify the number of electrons in P^-3.

The number 6.022 × 10²³ is known as ________.

If 8.32 g of copper is mixed with 5.2372 × 10^-2 mol of zinc to create the alloy brass, how many metal atoms total are present in the brass?