Question 1

In the following drawings,shaded spheres represent cations and unshaded spheres represent anions.  
-Which drawing represents the ionic compound KNO3?

Accepted Answer

A) drawing (a) 
B) drawing (b) 
C) drawing (c) 
D) drawing (d) 
A) drawing (a) 
B) drawing (b) 
C) drawing (c) 
D) drawing (d)

Question 2

Which of the following elements would you expect to have the largest number of stable isotopes? Element number:

Accepted Answer

A) 48 
B) 49 
C) 50 
D) 51 
A) 48 
B) 49 
C) 50 
D) 51

Question 3

The number of nucleons in a  
 nucleus is

Accepted Answer

A) 90. 
B) 144. 
C) 234. 
D) 324. 
A) 90. 
B) 144. 
C) 234. 
D) 324.

Question 4

Most of the alpha particles directed at a thin gold foil in Rutherford's experiment

Accepted Answer

A) bounced directly back from the foil. 
B) passed directly through the foil undeflected. 
C) passed through the foil but were deflected at an angle. 
D) were absorbed by the foil. 
A) bounced directly back from the foil. 
B) passed directly through the foil undeflected. 
C) passed through the foil but were deflected at an angle. 
D) were absorbed by the foil.

Question 5

What is the chemical symbol for an atom that has 29 protons and 36 neutrons?

Accepted Answer

A) Cu 
B) Kr 
C) N 
D) Tb 
A) Cu 
B) Kr 
C) N 
D) Tb

Question 6

Which process decreases the neutron/proton ratio?

Accepted Answer

A) alpha emission 
B) beta emission 
C) electron capture 
D) positron emission 
A) alpha emission 
B) beta emission 
C) electron capture 
D) positron emission

Question 7

Which of the following figures represents  
? Unshaded spheres represent neutrons and shaded spheres represent protons.

Accepted Answer

A) figure (1) 
B) figure (2) 
C) figure (3) 
D) figure (4) 
A) figure (1) 
B) figure (2) 
C) figure (3) 
D) figure (4)

Question 8

If shaded and unshaded spheres represent atoms of different elements,as shown in drawing (1),which drawings (2)-(4)represent the law of multiple proportions?

Accepted Answer

A) only drawings (2)and (3) 
B) only drawings (2)and (4) 
C) only drawings (3)and (4) 
D) drawings (2),(3),and (4) 
A) only drawings (2)and (3) 
B) only drawings (2)and (4) 
C) only drawings (3)and (4) 
D) drawings (2),(3),and (4)

Question 9

If shaded and unshaded spheres represent atoms of different elements,as shown in drawing (1),which drawings (2)-(4)represent the law of multiple proportions?

Accepted Answer

A) only drawings (2)and (3) 
B) only drawings (2)and (4) 
C) only drawings (3)and (4) 
D) drawings (2),(3),and (4) 
A) only drawings (2)and (3) 
B) only drawings (2)and (4) 
C) only drawings (3)and (4) 
D) drawings (2),(3),and (4)

Question 10

How many electrons are in a neutral atom of iodine-131?

Accepted Answer

A) 1 
B) 53 
C) 54 
D) 131 
A) 1 
B) 53 
C) 54 
D) 131

Question 11

-If shaded and unshaded spheres represent atoms of different elements,which of the above drawings most likely represents a molecular compound at room temperature and a pressure of 1 atm?

Accepted Answer

A) drawing (a) 
B) drawing (b) 
C) drawing (c) 
D) drawing (d) 
A) drawing (a) 
B) drawing (b) 
C) drawing (c) 
D) drawing (d)

Question 12

Rb2S is named

Accepted Answer

A) rubidium disulfide. 
B) rubidium sulfide. 
C) rubidium(II)sulfide. 
D) rubidium sulfur. 
A) rubidium disulfide. 
B) rubidium sulfide. 
C) rubidium(II)sulfide. 
D) rubidium sulfur.

Question 13

Which of the compounds CH4,SrCl2,Cr(NO3)3,XeF2 are expected to exist as molecules?

Accepted Answer

A) only CH4 
B) CH4 and Xe F2 
C) CH4,Cr(NO3)2,and Xe F2 
D) SrCl2 and Cr(NO3)2 
A) only CH4 
B) CH4 and Xe F2 
C) CH4,Cr(NO3)2,and Xe F2 
D) SrCl2 and Cr(NO3)2

Question 14

-If shaded and unshaded spheres represent atoms of different elements,which of the above drawings most likely represents an ionic compound at room temperature and a pressure of 1 atm?

Accepted Answer

A) drawing (a) 
B) drawing (b) 
C) drawing (c) 
D) drawing (d) 
A) drawing (a) 
B) drawing (b) 
C) drawing (c) 
D) drawing (d)

Question 15

The subatomic particles contained in the nucleus of an atom are ________ and ________.

Accepted Answer

The answer of The subatomic particles contained in the nucleus...

Question 16

In a nuclear reaction,the symbol for a beta particle is ________.

Accepted Answer

The answer of In a nuclear reaction,the symbol for a...

Question 17

When  
Decays in a 5-step series the product is  
)How many alpha and beta particles are emitted in the decay series?

Accepted Answer

A) 2 α,3 β- 
B) 3 α,2 β- 
C) 4 α,1 β- 
D) 1 α,4 β- 
A) 2 α,3 β- 
B) 3 α,2 β- 
C) 4 α,1 β- 
D) 1 α,4 β-

In the following drawings,shaded spheres represent cations and unshaded spheres represent anions. -Which drawing represents the ionic compound KNO₃?

Which of the following elements would you expect to have the largest number of stable isotopes? Element number:

The number of nucleons in a nucleusis

Most of the alpha particles directed at a thin gold foil in Rutherford's experiment

What is the chemical symbol for an atom that has 29 protons and 36 neutrons?

Which process decreases the neutron/proton ratio?

Which of the following figures represents ? Unshaded spheres represent neutrons and shaded spheres represent protons.

If shaded and unshaded spheres represent atoms of different elements,as shown in drawing (1),which drawings (2)-(4)represent the law of multiple proportions?

If shaded and unshaded spheres represent atoms of different elements,as shown in drawing (1),which drawings (2)-(4)represent the law of multiple proportions?

How many electrons are in a neutral atom of iodine-131?

-If shaded and unshaded spheres represent atoms of different elements,which of the above drawings most likely represents a molecular compound at room temperature and a pressure of 1 atm?

Rb₂S is named

Which of the compounds CH₄,SrCl₂,Cr(NO₃)₃,XeF₂ are expected to exist as molecules?

-If shaded and unshaded spheres represent atoms of different elements,which of the above drawings most likely represents an ionic compound at room temperature and a pressure of 1 atm?

The subatomic particles contained in the nucleus of an atom are and .

In a nuclear reaction,the symbol for a beta particle is ________.

When Decays in a 5-step series the product is )How many alpha and beta particles are emitted in the decay series?

Chemistry: Matter and Measurement

Formulas, equations, and Moles

Reactions in Aqueous Solutions

Periodicity and the Atomic Structure of Atoms

Ionic Bonds and Some Main-Group Chemistry

Covalent Bonds and Molecular Structure

Thermochemistry: Chemical Energy

Gases: Their Properties and Behavior

Liquids,solids,and Phase Changes

Solutions and Their Properties

Chemical Kinetics

Chemical Equilibrium

Aqueous Equilibria: Acids and Bases

Applications of Aqueous Equilibria

Thermodynamics: Entropy, free Energy, and Equilibrium

Electrochemistry

Hydrogen, oxygen, and Water

The Main-Group Elements

Transition Elements and Coordination Chemistry

Metals and Solid-State Materials

Nuclear Chemistry

Organic and Biological Chemistry

Filters

Exam 2: Atoms, molecules, and Ions

In the following drawings,shaded spheres represent cations and unshaded spheres represent anions. -Which drawing represents the ionic compound KNO3?

Which of the following elements would you expect to have the largest number of stable isotopes? Element number:

The number of nucleons in a nucleus is

Most of the alpha particles directed at a thin gold foil in Rutherford's experiment

What is the chemical symbol for an atom that has 29 protons and 36 neutrons?

Which process decreases the neutron/proton ratio?

Which of the following figures represents ? Unshaded spheres represent neutrons and shaded spheres represent protons.

If shaded and unshaded spheres represent atoms of different elements,as shown in drawing (1),which drawings (2)-(4)represent the law of multiple proportions?

If shaded and unshaded spheres represent atoms of different elements,as shown in drawing (1),which drawings (2)-(4)represent the law of multiple proportions?

How many electrons are in a neutral atom of iodine-131?

-If shaded and unshaded spheres represent atoms of different elements,which of the above drawings most likely represents a molecular compound at room temperature and a pressure of 1 atm?

Rb2S is named

Which of the compounds CH4,SrCl2,Cr(NO3)3,XeF2 are expected to exist as molecules?

-If shaded and unshaded spheres represent atoms of different elements,which of the above drawings most likely represents an ionic compound at room temperature and a pressure of 1 atm?

The subatomic particles contained in the nucleus of an atom are ________ and ________.

In a nuclear reaction,the symbol for a beta particle is ________.

When Decays in a 5-step series the product is )How many alpha and beta particles are emitted in the decay series?

Chemistry: Matter and Measurement

Formulas, equations, and Moles

Reactions in Aqueous Solutions

Periodicity and the Atomic Structure of Atoms

Ionic Bonds and Some Main-Group Chemistry

Covalent Bonds and Molecular Structure

Thermochemistry: Chemical Energy

Gases: Their Properties and Behavior

Liquids,solids,and Phase Changes

Solutions and Their Properties

Chemical Kinetics

Chemical Equilibrium

Aqueous Equilibria: Acids and Bases

Applications of Aqueous Equilibria

Thermodynamics: Entropy, free Energy, and Equilibrium

Electrochemistry

Hydrogen, oxygen, and Water

The Main-Group Elements

Transition Elements and Coordination Chemistry

Metals and Solid-State Materials

Nuclear Chemistry

Organic and Biological Chemistry

Filters

In the following drawings,shaded spheres represent cations and unshaded spheres represent anions. -Which drawing represents the ionic compound KNO₃?

The number of nucleons in a nucleusis

Rb₂S is named

Which of the compounds CH₄,SrCl₂,Cr(NO₃)₃,XeF₂ are expected to exist as molecules?

The subatomic particles contained in the nucleus of an atom are and .