Question 1

A sodium atom is larger than a silicon atom.

Accepted Answer

A) True 
 B)False

Question 2

Chromium is a metal.

Accepted Answer

A) True 
 B)False

Question 3

Write in the electronic configuration for the atom shown.
-Chlorine

Accepted Answer

The answer of Write in the electronic configuration for the...

Question 4

The primary substances of which all other things are composed are

Accepted Answer

A)  molecules. 
B)  compounds. 
C)  elements. 
D)  electrons. 
E)  protons. 
A)  molecules. 
B)  compounds. 
C)  elements. 
D)  electrons. 
E)  protons.

Question 5

Which of the following electron configurations is impossible?

Accepted Answer

A) 1s22s22p63s23p1 
B)  1s22 s42p63s23p3 
C) 1s22s22p63s23 p5 
D) 1s22s22p63s23p6 
E) 1s22s22p63s23p3 
A) 1s22s22p63s23p1 
B)  1s22 s42p63s23p3 
C) 1s22s22p63s23 p5 
D) 1s22s22p63s23p6 
E) 1s22s22p63s23p3

Question 6

According to the Atomic Theory,

Accepted Answer

A)  all atoms are different. 
B)  atoms are neither created nor destroyed during a chemical reaction. 
C)  atoms of the same element combine to form compounds. 
D)  all matter is made up of tiny particles called electrons. 
E)  a compound can contain different numbers of atoms as long as it has the same kinds of atoms. 
A)  all atoms are different. 
B)  atoms are neither created nor destroyed during a chemical reaction. 
C)  atoms of the same element combine to form compounds. 
D)  all matter is made up of tiny particles called electrons. 
E)  a compound can contain different numbers of atoms as long as it has the same kinds of atoms.

Question 7

Which of the following properties is NOT a characteristic of the Group 1A(1) elements (alkali metals)?

Accepted Answer

A)  They are shiny. 
B)  They are good conductors of heat. 
C)  They react vigorously with water. 
D)  Most of them are liquids at room temperature. 
E)  They are good conductors of electricity. 
A)  They are shiny. 
B)  They are good conductors of heat. 
C)  They react vigorously with water. 
D)  Most of them are liquids at room temperature. 
E)  They are good conductors of electricity.

Question 8

Consider a neutral atom with 30 protons and 34 neutrons. The atomic number of the element is

Accepted Answer

A)  30. 
B)  32. 
C)  34. 
D)  64. 
E)  94. 
A)  30. 
B)  32. 
C)  34. 
D)  64. 
E)  94.

Question 9

Match the correct symbols with the names of elements.
-chlorine

Accepted Answer

A) C 
B) Co 
C) Cu 
D) Cl 
E) Ca 
A) C 
B) Co 
C) Cu 
D) Cl 
E) Ca

Question 10

The atomic mass of an element is equal to

Accepted Answer

A)  its mass number. 
B)  its atomic number. 
C)  one-twelfth of the mass of a carbon-12 atom. 
D)  a weighted average mass of all of the naturally occurring isotopes of the element. 
E)  the average mass of all of the naturally occurring isotopes of the element. 
A)  its mass number. 
B)  its atomic number. 
C)  one-twelfth of the mass of a carbon-12 atom. 
D)  a weighted average mass of all of the naturally occurring isotopes of the element. 
E)  the average mass of all of the naturally occurring isotopes of the element.

Question 11

Write in the electronic configuration for the atom shown.
-Magnesium

Accepted Answer

The answer of Write in the electronic configuration for the...

Question 12

In an electron-dot structure of an element, the dots are used to represent

Accepted Answer

A)  all of the electrons in the atom. 
B)  the valence electrons. 
C)  the electron arrangement. 
D)  only the electrons that will participate in bond formation. 
E)  the electrons that the element will gain when it forms a compound. 
A)  all of the electrons in the atom. 
B)  the valence electrons. 
C)  the electron arrangement. 
D)  only the electrons that will participate in bond formation. 
E)  the electrons that the element will gain when it forms a compound.

Question 13

Classify the following elements.
-sodium

Accepted Answer

A) noble gas 
B) alkali metal 
C) nonmetal 
D) alkaline earth metal 
E) transition element
F)halogen 
A) noble gas 
B) alkali metal 
C) nonmetal 
D) alkaline earth metal 
E) transition element
F)halogen

Question 14

Classify the following elements.
-magnesium

Accepted Answer

A) noble gas 
B) alkali metal 
C) nonmetal 
D) alkaline earth metal 
E) transition element
F)halogen 
A) noble gas 
B) alkali metal 
C) nonmetal 
D) alkaline earth metal 
E) transition element
F)halogen

Question 15

Match the correct symbols with the names of elements.
-copper

Accepted Answer

A) C 
B) Co 
C) Cu 
D) Cl 
E) Ca 
A) C 
B) Co 
C) Cu 
D) Cl 
E) Ca

Question 16

What elements are in hydroxyapatite, Ca5(PO₄)3OH , a major compound in human bones and teeth?

Accepted Answer

A)  carbon, potassium, oxygen, hydrogen 
B)  calcium, phosphorus, oxygen, hydrogen 
C)  carbon, phosphorus, oxygen, helium 
D)  calcium, phosphorus, oxygen, helium 
E)  carbon, potassium, oxygen, helium 
A)  carbon, potassium, oxygen, hydrogen 
B)  calcium, phosphorus, oxygen, hydrogen 
C)  carbon, phosphorus, oxygen, helium 
D)  calcium, phosphorus, oxygen, helium 
E)  carbon, potassium, oxygen, helium

Question 17

Do the following represent elements in a group, a period, or neither?
-Li, C, F

Accepted Answer

A) period 
B) neither 
C) group 
A) period 
B) neither 
C) group

Question 18

The elements lithium, sodium, and potassium

Accepted Answer

A)  are isotopes of each other. 
B)  are in the same period of elements. 
C)  have the same number of neutrons. 
D)  are in the same group. 
E)  have the same mass number. 
A)  are isotopes of each other. 
B)  are in the same period of elements. 
C)  have the same number of neutrons. 
D)  are in the same group. 
E)  have the same mass number.

Question 19

What is the symbol of the element in Group 4A(14) and Period 2?

Accepted Answer

A)  Be 
B)  Mg 
C)  Ca 
D)  C 
E)  Si 
A)  Be 
B)  Mg 
C)  Ca 
D)  C 
E)  Si

Question 20

Classify the following elements.
-copper

Accepted Answer

A) noble gas 
B) alkali metal 
C) nonmetal 
D) alkaline earth metal 
E) transition element
F)halogen 
A) noble gas 
B) alkali metal 
C) nonmetal 
D) alkaline earth metal 
E) transition element
F)halogen

Exam 3: Atoms and Elements

A sodium atom is larger than a silicon atom.

Chromium is a metal.

Write in the electronic configuration for the atom shown. -Chlorine

The primary substances of which all other things are composed are

Which of the following electron configurations is impossible?

According to the Atomic Theory,

Which of the following properties is NOT a characteristic of the Group 1A(1) elements (alkali metals)?

Consider a neutral atom with 30 protons and 34 neutrons. The atomic number of the element is

Match the correct symbols with the names of elements. -chlorine

The atomic mass of an element is equal to

Write in the electronic configuration for the atom shown. -Magnesium

In an electron-dot structure of an element, the dots are used to represent

Classify the following elements. -sodium

Classify the following elements. -magnesium

Match the correct symbols with the names of elements. -copper

What elements are in hydroxyapatite, Ca5(PO₄)3OH , a major compound in human bones and teeth?

Do the following represent elements in a group, a period, or neither? -Li, C, F

The elements lithium, sodium, and potassium

What is the symbol of the element in Group 4A(14) and Period 2?

Classify the following elements. -copper

Chemistry and Measurements

Energy and Matter

Nuclear Chemistry

Compounds and Their Bonds

Chemical Reactions and Quantities

Gases

Solutions

Reaction Rates and Chemical Equilibrium

Acids and Bases

Introduction to Organic Chemistry: Alkanes

Alkenes, Alkynes, and Aromatic Compounds

Alcohols, Phenols, Thiols, and Ethers

Aldehydes, Ketones, and Chiral Molecules

Carbohydrates

Carboxylic Acids and Esters

Lipids

Amines and Amides

Amino Acids and Proteins

Enzymes and Vitamins

Nucleic Acids and Protein Synthesis

Metabolic Pathways for Carbohydrates

Metabolism and Energy Production

Metabolic Pathways for Lipids and Amino Acids

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What elements are in hydroxyapatite, Ca₅(PO₄)₃OH , a major compound in human bones and teeth?