Question 1

Calcium carbonate (CaCO₃) is 34.5% Ca by mass. In a 418 g sample of CaCO₃, how many grams of calcium are present?

Accepted Answer

A)  144 g 
B)  40.08 g 
C)  235.1 g 
D)  83.6 g 
A)  144 g 
B)  40.08 g 
C)  235.1 g 
D)  83.6 g

Question 2

Which of the following is not a metal?

Accepted Answer

A)  Ca 
B)  Pt 
C)  Kr 
D)  Mg 
A)  Ca 
B)  Pt 
C)  Kr 
D)  Mg

Question 3

A neutral atom's atomic number is equal to ________.

Accepted Answer

A)  the number of nucleons 
B)  the sum of the number of protons and neutrons 
C)  the number of electrons 
D)  the number of neutrons 
A)  the number of nucleons 
B)  the sum of the number of protons and neutrons 
C)  the number of electrons 
D)  the number of neutrons

Question 4

Which of the following terms applies to the vertical columns found on a periodic table?

Accepted Answer

A)  arrangement 
B)  group 
C)  period 
D)  isotope 
A)  arrangement 
B)  group 
C)  period 
D)  isotope

Question 5

Which element would have a similar chemical reactivity in water as K?

Accepted Answer

A)  Ca 
B)  Ar 
C)  Rb 
D)  H 
A)  Ca 
B)  Ar 
C)  Rb 
D)  H

Question 6

Which of the following is a transition element?

Accepted Answer

A)  Co 
B)  Eu 
C)  Es 
D)  He 
A)  Co 
B)  Eu 
C)  Es 
D)  He

Question 7

Group VIIIA of the periodic table contains elements that are gaseous non-metals.

Accepted Answer

A) True 
 B)False

Question 8

Group IIA of the periodic table contains elements that are gaseous non-metals.

Accepted Answer

A) True 
 B)False

Question 9

Noble gases occupy Group VII in the periodic table.

Accepted Answer

A) True 
 B)False

Question 10

Which of the following has more electrons than neutrons?

Accepted Answer

A)  24Mg2+ 
B)  27Al 
C)  75As3- 
D)  32S2- 
A)  24Mg2+ 
B)  27Al 
C)  75As3- 
D)  32S2-

Question 11

Which has more electrons?

Accepted Answer

A)  Br- 
B)  Sr 2+ 
C)  Rb 
D)  As 3+ 
A)  Br- 
B)  Sr 2+ 
C)  Rb 
D)  As 3+

Question 12

The law of constant composition states that atoms must combine in a one to one ratio.

Accepted Answer

A) True 
 B)False

Question 13

24.3 g of magnesium yield 40.3 g MgO upon combustion with oxygen. How much magnesium needs to be burned to yield 12.1 g MgO?

Accepted Answer

A)  4.30 g 
B)  6.10 g 
C)  7.30 g 
D)  8.40 g 
A)  4.30 g 
B)  6.10 g 
C)  7.30 g 
D)  8.40 g

Question 14

Which representative element is found in the fourth group and fifth period?

Accepted Answer

A)  Br 
B)  Te 
C)  Sn 
D)  Ge 
A)  Br 
B)  Te 
C)  Sn 
D)  Ge

Question 15

Earth's gravitational force is incapable of keeping the atmospheric helium from escaping into space.

Accepted Answer

A) True 
 B)False

Question 16

Mercury is the only metal that is a liquid at room temperature.

Accepted Answer

A) True 
 B)False

Question 17

Which of the following elements is a halogen?

Accepted Answer

A)  He 
B)  B 
C)  F 
D)  Kr 
A)  He 
B)  B 
C)  F 
D)  Kr

Question 18

A compound is produced when 6.08 g of nitrogen combine with 13.92 g oxygen. What is the empirical formula of this compound?

Accepted Answer

A)  NO 
B)  NO₂ 
C)  N₂O₃ 
D)  N₂O5 
A)  NO 
B)  NO₂ 
C)  N₂O₃ 
D)  N₂O5

Question 19

Sulfur belongs to the chalcogen family.

Accepted Answer

A) True 
 B)False

Question 20

Write the atomic symbols for the following neutral isotopes.
-cobalt-60

Accepted Answer

atomic num

Calcium carbonate (CaCO₃) is 34.5% Ca by mass. In a 418 g sample of CaCO₃, how many grams of calcium are present?

Which of the following is not a metal?

A neutral atom's atomic number is equal to ________.

Which of the following terms applies to the vertical columns found on a periodic table?

Which element would have a similar chemical reactivity in water as K?

Which of the following is a transition element?

Group VIIIA of the periodic table contains elements that are gaseous non-metals.

Group IIA of the periodic table contains elements that are gaseous non-metals.

Noble gases occupy Group VII in the periodic table.

Which of the following has more electrons than neutrons?

Which has more electrons?

The law of constant composition states that atoms must combine in a one to one ratio.

24.3 g of magnesium yield 40.3 g MgO upon combustion with oxygen. How much magnesium needs to be burned to yield 12.1 g MgO?

Which representative element is found in the fourth group and fifth period?

Earth's gravitational force is incapable of keeping the atmospheric helium from escaping into space.

Mercury is the only metal that is a liquid at room temperature.

Which of the following elements is a halogen?

A compound is produced when 6.08 g of nitrogen combine with 13.92 g oxygen. What is the empirical formula of this compound?

Sulfur belongs to the chalcogen family.

Write the atomic symbols for the following neutral isotopes. -cobalt-60

What Is Chemistry

The Numerical Side of Chemistry

The Modern Model of the Atom

Chemical Bonding and Nomenclature

The Shape of Molecules

Intermolecular Forces and the Phases of Matter

Chemical Reactions

Stoichiometry and the Mole

Electron Transfer in Chemical Reactions

What If There Were No Intermolecular Forces - the Ideal Gas

Solutions

When Reactants Turn Into Products

Chemical Equilibrium

Electrolytes, Acids, and Bases

Nuclear Chemistry

The Chemistry of Carbon

Synthetic and Biological Polymers

Filters

Exam 3: The Evolution of Atomic Theory

Calcium carbonate (CaCO₃) is 34.5% Ca by mass. In a 418 g sample of CaCO₃, how many grams of calcium are present?

Which of the following is not a metal?

A neutral atom's atomic number is equal to ________.

Which of the following terms applies to the vertical columns found on a periodic table?

Which element would have a similar chemical reactivity in water as K?

Which of the following is a transition element?

Group VIIIA of the periodic table contains elements that are gaseous non-metals.

Group IIA of the periodic table contains elements that are gaseous non-metals.

Noble gases occupy Group VII in the periodic table.

Which of the following has more electrons than neutrons?

Which has more electrons?

The law of constant composition states that atoms must combine in a one to one ratio.

24.3 g of magnesium yield 40.3 g MgO upon combustion with oxygen. How much magnesium needs to be burned to yield 12.1 g MgO?

Which representative element is found in the fourth group and fifth period?

Earth's gravitational force is incapable of keeping the atmospheric helium from escaping into space.

Mercury is the only metal that is a liquid at room temperature.

Which of the following elements is a halogen?

A compound is produced when 6.08 g of nitrogen combine with 13.92 g oxygen. What is the empirical formula of this compound?

Sulfur belongs to the chalcogen family.

Write the atomic symbols for the following neutral isotopes. -cobalt-60

What Is Chemistry

The Numerical Side of Chemistry

The Modern Model of the Atom

Chemical Bonding and Nomenclature

The Shape of Molecules

Intermolecular Forces and the Phases of Matter

Chemical Reactions

Stoichiometry and the Mole

Electron Transfer in Chemical Reactions

What If There Were No Intermolecular Forces - the Ideal Gas

Solutions

When Reactants Turn Into Products

Chemical Equilibrium

Electrolytes, Acids, and Bases

Nuclear Chemistry

The Chemistry of Carbon

Synthetic and Biological Polymers

Filters