Question 1

The number of protons and neutrons in the nucleus of a given atom is called the atomic number.

Accepted Answer

A) True 
 B)False

Question 2

Groups,or families,on the periodic table are:

Accepted Answer

A) vertical columns of elements with similar properties 
B) horizontal rows of elements with increasing atomic numbers 
C) named for the first elements in the series;such as "actinides" 
D) extremely reactive with each other 
E) elements that all occur naturally in the same state 
A) vertical columns of elements with similar properties 
B) horizontal rows of elements with increasing atomic numbers 
C) named for the first elements in the series;such as "actinides" 
D) extremely reactive with each other 
E) elements that all occur naturally in the same state

Question 3

How many moles of Fe is present in 1.2 grams of Fe?

Accepted Answer

A) 2.15 × 10-2 mol 
B) 0.215 mol 
C) 4.30 × 10-2 mol 
D) 2.15 × 10-1 mol 
E) 0.430 mol 
A) 2.15 × 10-2 mol 
B) 0.215 mol 
C) 4.30 × 10-2 mol 
D) 2.15 × 10-1 mol 
E) 0.430 mol

Question 4

How many atoms of silicon are contained in 8.50 × 10-5 grams?

Accepted Answer

A) 1.44 × 1023 atoms 
B) 1.82 × 1018 atoms 
C) 5.02 × 1030 atoms 
D) 5.02 × 1018 atoms 
E) 1.82 × 1020 atoms 
A) 1.44 × 1023 atoms 
B) 1.82 × 1018 atoms 
C) 5.02 × 1030 atoms 
D) 5.02 × 1018 atoms 
E) 1.82 × 1020 atoms

Question 5

The total numbers of neutrons,protons,and electrons in 31P3- are:

Accepted Answer

A) 15 neutrons,31 protons,15 electrons 
B) 16 neutrons,15 protons,18 electrons 
C) 31 neutrons,15 protons,18 electrons 
D) 15 neutrons,16 protons,12 electrons 
E) 16 neutrons,16 protons,18 electrons 
A) 15 neutrons,31 protons,15 electrons 
B) 16 neutrons,15 protons,18 electrons 
C) 31 neutrons,15 protons,18 electrons 
D) 15 neutrons,16 protons,12 electrons 
E) 16 neutrons,16 protons,18 electrons

Question 6

A species that differs in charge from another atom of the same element:
I.is called an isotope
II.has more or less neutrons
III.has lost or gained electrons
IV.is called an ion
V.has the same number of protons

Accepted Answer

A) I and II 
B) I and III 
C) II and IV 
D) III and IV 
E) III,IV,V 
A) I and II 
B) I and III 
C) II and IV 
D) III and IV 
E) III,IV,V

Question 7

24.9 g of Mn is equivalent to how many moles of Mn?

Accepted Answer

A) 2.21 moles 
B) 0.453 moles 
C) 0.461 moles 
D) 0.996 moles 
E) 1.00 mole 
A) 2.21 moles 
B) 0.453 moles 
C) 0.461 moles 
D) 0.996 moles 
E) 1.00 mole

Question 8

With mass spectral data the ratio of the mass of  
Was found to be 1.167.What is the mass of the 14N atom?

Accepted Answer

A) 14.017 u 
B) 10.292 u 
C) 14.004 u 
D) 17.000 u 
E) 14.007 u 
A) 14.017 u 
B) 10.292 u 
C) 14.004 u 
D) 17.000 u 
E) 14.007 u

Question 9

An isotope with mass number 81 has eleven more neutrons than protons.This is an isotope of what element?

Accepted Answer

A) Tl 
B) Yb 
C) Zr 
D) Br 
E) Nb 
A) Tl 
B) Yb 
C) Zr 
D) Br 
E) Nb

Question 10

Beta particles:

Accepted Answer

A) have a mass of 4 and a charge of +2 
B) are like X-rays 
C) are repelled by a positively charged plate 
D) can be electrons 
E) have the same mass as a neutron 
A) have a mass of 4 and a charge of +2 
B) are like X-rays 
C) are repelled by a positively charged plate 
D) can be electrons 
E) have the same mass as a neutron

Question 11

A new element is discovered.It has two isotopes.The relative abundance of the isotopes and their masses are 18% isotope 1,mass 350.0 u and 82% isotope 2,mass 352.0 u.What is the atomic mass of the element?

Accepted Answer

A) 351.6 
B) 351.0 
C) 350.4 
D) 352.0 
E) 350.0 
A) 351.6 
B) 351.0 
C) 350.4 
D) 352.0 
E) 350.0

Question 12

When decomposed chemically,73.0 grams of a sample of HCl produce 71.0 g of Cl2 and 2.0 g of H2,while 34.0 g of a sample of H2S produce 32.0 g of S and 2.0 g of H2.This is an example of the law:

Accepted Answer

A) of conservation of mass 
B) of multiple proportions 
C) of definite proportions 
D) of constant composition 
E) of simple whole numbers 
A) of conservation of mass 
B) of multiple proportions 
C) of definite proportions 
D) of constant composition 
E) of simple whole numbers

Question 13

A 1.4 g sample of calcium is reacted with 3.2 g of oxygen.The only product after the reaction is 1.96 g of CaO.How many grams of oxygen remains unreacted?

Accepted Answer

A) 0.56 g 
B) 0.224 g 
C) 2.64 g 
D) 0.264 g 
E) 0.203 g 
A) 0.56 g 
B) 0.224 g 
C) 2.64 g 
D) 0.264 g 
E) 0.203 g

Question 14

What mass of magnesium is necessary to make 10.5 g of magnesium bromide if 1.04 g of magnesium makes 7.88 g of magnesium bromide?

Accepted Answer

A) 1.39 g 
B) 79.9 g 
C) 1.58 g 
D) 3.66 g 
E) 7.89 g 
A) 1.39 g 
B) 79.9 g 
C) 1.58 g 
D) 3.66 g 
E) 7.89 g

Question 15

How many electrons are in the ion P3-?

Accepted Answer

A) 12 
B) 18 
C) 28 
D) 34 
A) 12 
B) 18 
C) 28 
D) 34

Question 16

An atom of 131I contains ________ neutrons.

Accepted Answer

A) 53 
B) 184 
C) 78 
D) 124 
E) 131 
A) 53 
B) 184 
C) 78 
D) 124 
E) 131

Question 17

A lead cube that is 3.00 cm on each side contains  
Atoms.What is the density of this cube in g/cm3?

Accepted Answer

A) 34.1 g/cm3 
B) 11.4 g/cm3 
C) 0.0550 g/cm3 
D) 0.990 g/cm3 
E) 26.7 g/cm3 
A) 34.1 g/cm3 
B) 11.4 g/cm3 
C) 0.0550 g/cm3 
D) 0.990 g/cm3 
E) 26.7 g/cm3

Question 18

Which of the following is a metalloid?

Accepted Answer

A) mercury 
B) selenium 
C) bismuth 
D) radium 
E) calcium 
A) mercury 
B) selenium 
C) bismuth 
D) radium 
E) calcium

Question 19

How many protons,neutrons,and electrons are in   Mg2+?

Accepted Answer

A) 12 protons,10 electrons,12 neutrons 
B) 12 protons,12 electrons,12 neutrons 
C) 12 protons,12 electrons,24 neutrons 
D) 24 protons,10 electrons,12 neutrons 
E) 10 protons,12 electrons,24 neutrons 
A) 12 protons,10 electrons,12 neutrons 
B) 12 protons,12 electrons,12 neutrons 
C) 12 protons,12 electrons,24 neutrons 
D) 24 protons,10 electrons,12 neutrons 
E) 10 protons,12 electrons,24 neutrons

Exam 2: Atoms and the Atomic Theory

The number of protons and neutrons in the nucleus of a given atom is called the atomic number.

Groups,or families,on the periodic table are:

How many moles of Fe is present in 1.2 grams of Fe?

How many atoms of silicon are contained in 8.50 × 10-5 grams?

The total numbers of neutrons,protons,and electrons in 31P3- are:

A species that differs in charge from another atom of the same element: I.is called an isotope II.has more or less neutrons III.has lost or gained electrons IV.is called an ion V.has the same number of protons

24.9 g of Mn is equivalent to how many moles of Mn?

With mass spectral data the ratio of the mass of Was found to be 1.167.What is the mass of the 14N atom?

An isotope with mass number 81 has eleven more neutrons than protons.This is an isotope of what element?

Beta particles:

A new element is discovered.It has two isotopes.The relative abundance of the isotopes and their masses are 18% isotope 1,mass 350.0 u and 82% isotope 2,mass 352.0 u.What is the atomic mass of the element?

When decomposed chemically,73.0 grams of a sample of HCl produce 71.0 g of Cl2 and 2.0 g of H2,while 34.0 g of a sample of H2S produce 32.0 g of S and 2.0 g of H2.This is an example of the law:

A 1.4 g sample of calcium is reacted with 3.2 g of oxygen.The only product after the reaction is 1.96 g of CaO.How many grams of oxygen remains unreacted?

What mass of magnesium is necessary to make 10.5 g of magnesium bromide if 1.04 g of magnesium makes 7.88 g of magnesium bromide?

How many electrons are in the ion P3-?

An atom of 131I contains ________ neutrons.

A lead cube that is 3.00 cm on each side contains Atoms.What is the density of this cube in g/cm3?

Which of the following is a metalloid?

How many protons,neutrons,and electrons are in Mg2+?

Matter: Its Properties and Measurement

Chemical Compounds

Chemical Reactions

Introduction to Reactions in Aqueous Solutions

Gases

Thermochemistry

Electrons in Atoms

The Periodic Table and Some Atomic Properties

Chemical Bonding I: Basic Concepts

Chemical Bonding Ii: Valence Bond and Molecular Orbital Theories

Intermolecular Forces: Liquids and Solids

Spontaneous Change: Entropy and Gibbs Energy

Solutions and Their Physical Properties

Principles of Chemical Equilibrium

Acids and Bases

Additional Aspects of Acidbase Equilibria

Solubility and Complex-Ion Equilibria

Electrochemistry

Chemical Kinetics

Chemistry of the Main-Group Elements I: Groups 1,2,13,and 14

Chemistry of the Main-Group Elements Ii: Groups 18,17,16,15,and Hydrogen

The Transition Elements

Complex Ions and Coordination Compounds

Nuclear Chemistry

Structures of Organic Compounds

Reactions of Organic Compounds

Chemistry of the Living State

Filters

How many atoms of silicon are contained in 8.50 × 10^-5 grams?

The total numbers of neutrons,protons,and electrons in ³¹P^3- are:

With mass spectral data the ratio of the mass of Was found to be 1.167.What is the mass of the ¹⁴N atom?

When decomposed chemically,73.0 grams of a sample of HCl produce 71.0 g of Cl₂ and 2.0 g of H₂,while 34.0 g of a sample of H₂S produce 32.0 g of S and 2.0 g of H₂.This is an example of the law:

How many electrons are in the ion P^3-?

An atom of ¹³¹I contains ________ neutrons.

A lead cube that is 3.00 cm on each side contains Atoms.What is the density of this cube in g/cm³?

How many protons,neutrons,and electrons are in Mg²⁺?