Question 1

What is the charge on the cesium ion?

Accepted Answer

A) 1- 
B) 2- 
C) 1+ 
D) 2+ 
E) none of the above 
A) 1- 
B) 2- 
C) 1+ 
D) 2+ 
E) none of the above

Question 2

All elemental symbols are comprised of a two-letter abbreviation.

Accepted Answer

A) True 
 B)False

Question 3

How many protons are found in C-14?

Accepted Answer

A) 8 
B) 14 
C) 6 
D) 0 
E) none of the above 
A) 8 
B) 14 
C) 6 
D) 0 
E) none of the above

Question 4

The number of protons in the nucleus of an atom:

Accepted Answer

A) is called the atomic number. 
B) is given the symbol "Z." 
C) identifies the atom as a particular element. 
D) is the same for all isotopes of an element. 
E) all of the above 
A) is called the atomic number. 
B) is given the symbol "Z." 
C) identifies the atom as a particular element. 
D) is the same for all isotopes of an element. 
E) all of the above

Question 5

What is the correct chemical symbol for mercury?

Accepted Answer

A) Hm 
B) Hy 
C) Me 
D) My 
E) none of the above 
A) Hm 
B) Hy 
C) Me 
D) My 
E) none of the above

Question 6

How many neutrons are found in Ne-21?

Accepted Answer

A) 11 
B) 21 
C) 10 
D) 0 
E) none of the above 
A) 11 
B) 21 
C) 10 
D) 0 
E) none of the above

Question 7

An isotope represented as S-34:

Accepted Answer

A) is an isotope of sodium. 
B) contains exactly 18 neutrons. 
C) has 34 protons. 
D) must have exactly 18 electrons. 
E) none of the above 
A) is an isotope of sodium. 
B) contains exactly 18 neutrons. 
C) has 34 protons. 
D) must have exactly 18 electrons. 
E) none of the above

Question 8

How many protons and electrons are present in O2-?

Accepted Answer

A) 8 protons and 8 electrons 
B) 10 protons and 8 electrons 
C) 8 protons and 10 electrons 
D) 16 protons and 8 electrons 
E) none of the above 
A) 8 protons and 8 electrons 
B) 10 protons and 8 electrons 
C) 8 protons and 10 electrons 
D) 16 protons and 8 electrons 
E) none of the above

Question 9

Ernest Rutherford proved the existence of electrons.

Accepted Answer

A) True 
 B)False

Question 10

Group 8A elements are also called:

Accepted Answer

A) noble gases. 
B) halogens. 
C) alkaline earth metals. 
D) alkali metals. 
E) none of the above 
A) noble gases. 
B) halogens. 
C) alkaline earth metals. 
D) alkali metals. 
E) none of the above

Question 11

The atomic mass of a single carbon atom is equal to exactly 12.011 amu.

Accepted Answer

A) True 
 B)False

Question 12

Given that the molecular mass of bromine is 79.90 grams,which of the following isotopes would you expect to have the greatest natural abundance?

Accepted Answer

A) Br-79 
B) Br-80 
C) Br-81 
D) Br-82 
E) none of the above 
A) Br-79 
B) Br-80 
C) Br-81 
D) Br-82 
E) none of the above

Question 13

Isotopes are atoms of the same element that have a different numbers of neutrons.

Accepted Answer

A) True 
 B)False

Question 14

Ions are formed when atoms:

Accepted Answer

A) gain or lose protons. 
B) gain or lose electrons. 
C) gain or lose neutrons. 
D) Each of these results in ion formation. 
E) None of these results in ion formation. 
A) gain or lose protons. 
B) gain or lose electrons. 
C) gain or lose neutrons. 
D) Each of these results in ion formation. 
E) None of these results in ion formation.

Question 15

Halogens form anions with a 1- charge.

Accepted Answer

A) True 
 B)False

Question 16

What is the charge on the ion formed by aluminum?

Accepted Answer

A) 5- 
B) 3- 
C) 13+ 
D) 3+ 
E) none of the above 
A) 5- 
B) 3- 
C) 13+ 
D) 3+ 
E) none of the above

Question 17

Which of the following is NOT part of Dalton's Atomic Theory?

Accepted Answer

A) Each element is composed of tiny indestructible particles called atoms. 
B) All atoms of a given element have the same mass and other properties that distinguish them from the atoms of other elements. 
C) Atoms combine in simple,whole-number ratios to form compounds. 
D) Most of the atom's mass and all of its positive charge is contained in a small core called the nucleus. 
E) All of the above are part of the atomic theory. 
A) Each element is composed of tiny indestructible particles called atoms. 
B) All atoms of a given element have the same mass and other properties that distinguish them from the atoms of other elements. 
C) Atoms combine in simple,whole-number ratios to form compounds. 
D) Most of the atom's mass and all of its positive charge is contained in a small core called the nucleus. 
E) All of the above are part of the atomic theory.

Question 18

Which of the statements about the discovery of electrons is FALSE?

Accepted Answer

A) Because atoms are neutral,the existence of a negatively charged particle implied there must be a positively charged component of an atom. 
B) Thomson proposed that electrons were small particles held within a positively charged sphere. 
C) Rutherford proved the plum-pudding model correct. 
D) The negatively charged electron is located outside the nucleus. 
E) All of the above statements are true. 
A) Because atoms are neutral,the existence of a negatively charged particle implied there must be a positively charged component of an atom. 
B) Thomson proposed that electrons were small particles held within a positively charged sphere. 
C) Rutherford proved the plum-pudding model correct. 
D) The negatively charged electron is located outside the nucleus. 
E) All of the above statements are true.

Question 19

Which statement below accurately describes the contributions of Democritus?

Accepted Answer

A) ancient Greek philosopher who proposed that matter was not continuous 
B) created the modern periodic table 
C) proposed the modern Atomic Theory 
D) discovered the existence of electrons 
E) none of the above 
A) ancient Greek philosopher who proposed that matter was not continuous 
B) created the modern periodic table 
C) proposed the modern Atomic Theory 
D) discovered the existence of electrons 
E) none of the above

Question 20

What is the correct formula for a potassium ion with 18 electrons?

Accepted Answer

A) P+ 
B) K+ 
C) K- 
D) P- 
E) none of the above 
A) P+ 
B) K+ 
C) K- 
D) P- 
E) none of the above

What is the charge on the cesium ion?

All elemental symbols are comprised of a two-letter abbreviation.

How many protons are found in C-14?

The number of protons in the nucleus of an atom:

What is the correct chemical symbol for mercury?

How many neutrons are found in Ne-21?

An isotope represented as S-34:

How many protons and electrons are present in O^2-?

Ernest Rutherford proved the existence of electrons.

Group 8A elements are also called:

The atomic mass of a single carbon atom is equal to exactly 12.011 amu.

Given that the molecular mass of bromine is 79.90 grams,which of the following isotopes would you expect to have the greatest natural abundance?

Isotopes are atoms of the same element that have a different numbers of neutrons.

Ions are formed when atoms:

Halogens form anions with a 1- charge.

What is the charge on the ion formed by aluminum?

Which of the following is NOT part of Dalton's Atomic Theory?

Which of the statements about the discovery of electrons is FALSE?

Which statement below accurately describes the contributions of Democritus?

What is the correct formula for a potassium ion with 18 electrons?

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Exam 4: Atoms and Elements

What is the charge on the cesium ion?

All elemental symbols are comprised of a two-letter abbreviation.

How many protons are found in C-14?

The number of protons in the nucleus of an atom:

What is the correct chemical symbol for mercury?

How many neutrons are found in Ne-21?

An isotope represented as S-34:

How many protons and electrons are present in O2-?

Ernest Rutherford proved the existence of electrons.

Group 8A elements are also called:

The atomic mass of a single carbon atom is equal to exactly 12.011 amu.

Given that the molecular mass of bromine is 79.90 grams,which of the following isotopes would you expect to have the greatest natural abundance?

Isotopes are atoms of the same element that have a different numbers of neutrons.

Ions are formed when atoms:

Halogens form anions with a 1- charge.

What is the charge on the ion formed by aluminum?

Which of the following is NOT part of Dalton's Atomic Theory?

Which of the statements about the discovery of electrons is FALSE?

Which statement below accurately describes the contributions of Democritus?

What is the correct formula for a potassium ion with 18 electrons?

The Chemical World

Measurement and Problem Solving

Matter and Energy

Molecules and Compounds

Chemical Composition

Chemical Reactions

Quantities in Chemical Reactions

Electrons in Atoms and the Periodic Table

Chemical Bonding

Gases

Liquids, solids, and Intermolecular Forces

Solutions

Acids and Bases

Chemical Equilibrium

Oxidation and Reduction

Radioactivity and Nuclear Chemistry

Organic Chemistry

Biochemistry

Filters

How many protons and electrons are present in O^2-?