Question 1

Which of the compounds,Na3P,PH3,C2H6,IBr3,are ionic compounds?

Accepted Answer

A) only C2H6 
B) only Na3P 
C) Na3P and PH3 
D) PH3,C2H6,and IBr3 
A) only C2H6 
B) only Na3P 
C) Na3P and PH3 
D) PH3,C2H6,and IBr3

Question 2

In the following drawings,shaded spheres represent cations and unshaded spheres represent anions.  
-Which drawing represents the ionic compound Ag2CO3?

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 3

.  
-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 4

The number of neutrons in a neutral atom of uranium-238 is ________.

Accepted Answer

The answer of The number of neutrons in a neutral...

Question 5

The observation that 15.0 g of hydrogen reacts with 120.0 g of oxygen to form 135.0 g of water is evidence for the law of

Accepted Answer

A) definite proportions. 
B) energy conservation. 
C) mass conservation. 
D) multiple proportions. 
A) definite proportions. 
B) energy conservation. 
C) mass conservation. 
D) multiple proportions.

Question 6

A sample of pure calcium fluoride with a mass of 15.0 g contains 7.70 g of calcium.How much calcium is contained in 45.0 g of calcium fluoride?

Accepted Answer

A) 2.56 g 
B) 7.70 g 
C) 15.0 g 
D) 23.1 g 
A) 2.56 g 
B) 7.70 g 
C) 15.0 g 
D) 23.1 g

Question 7

Give the molecular formula corresponding to the following ball-and-stick molecular representation of naphthalene (gray = C,unshaded = H).In writing the formula,list the atoms in alphabetical order.

Accepted Answer

A) CH 
B) C5H4 
C) C10H8 
D) C10H10 
A) CH 
B) C5H4 
C) C10H8 
D) C10H10

Question 8

Rubidium belongs to the ________ group of the periodic table.

Accepted Answer

A) alkali metal 
B) alkaline earth metal 
C) halogen 
D) noble gas 
A) alkali metal 
B) alkaline earth metal 
C) halogen 
D) noble gas

Question 9

Which element has the chemical symbol,N?

Accepted Answer

A) nickel 
B) niobium 
C) nitrogen 
D) nobelium 
A) nickel 
B) niobium 
C) nitrogen 
D) nobelium

Question 10

Chlorine has two common isotopes,chlorine-35 and chlorine-37,and an atomic mass of 35.45 amu.The natural abundance of chlorine-35 is ________ (greater than,less than,the same as)the natural abundance of chlorine-37.

Accepted Answer

The answer of Chlorine has two common isotopes,chlorine-35 and chlorine-37,and...

Question 11

An aqueous solution of H Cl is named

Accepted Answer

A) hydrochloric acid. 
B) hydrochlorous acid. 
C) chloric acid. 
D) chlorous acid. 
A) hydrochloric acid. 
B) hydrochlorous acid. 
C) chloric acid. 
D) chlorous acid.

Question 12

What group of elements does the shaded area in the following periodic table indicate?

Accepted Answer

A) alkali metals 
B) alkaline earth metals 
C) halogens 
D) noble gases 
A) alkali metals 
B) alkaline earth metals 
C) halogens 
D) noble gases

Question 13

The element antimony has an atomic weight of 121.757 amu and only two naturally-occurring isotopes.One isotope has an abundance of 57.3% and an isotopic mass of 120.904 amu.Based on these data,what is the mass of the other isotope?

Accepted Answer

A) 121.757 amu 
B) 122.393 amu 
C) 122.610 amu 
D) 122.902 amu 
A) 121.757 amu 
B) 122.393 amu 
C) 122.610 amu 
D) 122.902 amu

Question 14

Most elements in the periodic table are

Accepted Answer

A) metals. 
B) non-metals. 
C) noble gases. 
D) semi-metals. 
A) metals. 
B) non-metals. 
C) noble gases. 
D) semi-metals.

Question 15

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 16

In which set do all elements tend to form cations in binary ionic compounds?

Accepted Answer

A) Na,B,S 
B) Ca,Cr,Pb 
C) S,As,Bi 
D) O,Br,I 
A) Na,B,S 
B) Ca,Cr,Pb 
C) S,As,Bi 
D) O,Br,I

Question 17

If shaded and unshaded spheres represent atoms of different elements,as shown in drawing (1),which combination of 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 18

What is the identity of the element with 6 protons,7 neutrons,and 6 electrons?

Accepted Answer

A) C 
B) N 
C) Al 
D) Mg 
A) C 
B) N 
C) Al 
D) Mg

Question 19

In which of the following sets do all species have the same number of protons?

Accepted Answer

A) At-,Rn,Ra2+ 
B) C,N3-,O2- 
C) CO3+,Rh3+,Ir3+ 
D) Br,Co2+,Co3+ 
A) At-,Rn,Ra2+ 
B) C,N3-,O2- 
C) CO3+,Rh3+,Ir3+ 
D) Br,Co2+,Co3+

Question 20

The formula for dinitrogen trioxide is

Accepted Answer

A) N(OH)3. 
B) (NO3)2. 
C) N2O3. 
D) N3O2. 
A) N(OH)3. 
B) (NO3)2. 
C) N2O3. 
D) N3O2.

Exam 2: Atoms, molecules, and Ions

Which of the compounds,Na3P,PH3,C2H6,IBr3,are ionic compounds?

In the following drawings,shaded spheres represent cations and unshaded spheres represent anions. -Which drawing represents the ionic compound Ag2CO3?

. -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 number of neutrons in a neutral atom of uranium-238 is ________.

The observation that 15.0 g of hydrogen reacts with 120.0 g of oxygen to form 135.0 g of water is evidence for the law of

A sample of pure calcium fluoride with a mass of 15.0 g contains 7.70 g of calcium.How much calcium is contained in 45.0 g of calcium fluoride?

Give the molecular formula corresponding to the following ball-and-stick molecular representation of naphthalene (gray = C,unshaded = H).In writing the formula,list the atoms in alphabetical order.

Rubidium belongs to the ________ group of the periodic table.

Which element has the chemical symbol,N?

Chlorine has two common isotopes,chlorine-35 and chlorine-37,and an atomic mass of 35.45 amu.The natural abundance of chlorine-35 is ________ (greater than,less than,the same as)the natural abundance of chlorine-37.

An aqueous solution of H Cl is named

What group of elements does the shaded area in the following periodic table indicate?

The element antimony has an atomic weight of 121.757 amu and only two naturally-occurring isotopes.One isotope has an abundance of 57.3% and an isotopic mass of 120.904 amu.Based on these data,what is the mass of the other isotope?

Most elements in the periodic table are

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?

In which set do all elements tend to form cations in binary ionic compounds?

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

What is the identity of the element with 6 protons,7 neutrons,and 6 electrons?

In which of the following sets do all species have the same number of protons?

The formula for dinitrogen trioxide is

Chemical Tools: Experimentation and Measurement

Mass Relationships in Chemical Reactions

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Periodicity and the Electronic Structure of Atoms

Ionic Compounds: Periodic Trends and Bonding

Covalent Bonding and Electron-Dot Structures

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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

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Transition Elements and Coordination Chemistry

Metals and Solid-State Materials

The Main-Group Elements

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Filters

Which of the compounds,Na₃P,PH₃,C₂H₆,IBr₃,are ionic compounds?

In the following drawings,shaded spheres represent cations and unshaded spheres represent anions. -Which drawing represents the ionic compound Ag₂CO₃?

An aqueous solution of HCl is named