Question 1

How many electrons are present in the 77Se2- ion?

Accepted Answer

A)  32 
B)  34 
C)  43 
D)  77 
E)  none of these 
A)  32 
B)  34 
C)  43 
D)  77 
E)  none of these

Question 2

Calculate the number of electrons in a P3- ion if the mass number of phosphorus is 31 and the atomic number of this element is 15.

Accepted Answer

A)  12 
B)  15 
C)  18 
D)  31 
E)  34 
A)  12 
B)  15 
C)  18 
D)  31 
E)  34

Question 3

Atoms are isobaric if they have the same mass. Which of the following atoms or ions are isobaric?

(I) 51Cr3+ (II) 52Cr3+ (III) 55Mn3+ (IV) 59Ni4+ (V) 59Co3+

Accepted Answer

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

Question 4

use the data listed below.
  
-If you select a $\textbf{       single   }$ random atom of Ne from a naturally occurring sample, its mass is most likely to be

Accepted Answer

A)  19.99244 amu 
B)  20.99384 amu 
C)  21.99138 amu 
D)  20.179 amu 
E)  20.000 amu 
A)  19.99244 amu 
B)  20.99384 amu 
C)  21.99138 amu 
D)  20.179 amu 
E)  20.000 amu

Question 5

How many electrons are in 52Cr3+?

Accepted Answer

A)  3 
B)  21 
C)  24 
D)  27 
E)  28 
A)  3 
B)  21 
C)  24 
D)  27 
E)  28

Question 6

Complete the following table.

Accepted Answer

17, 37, 17

Question 7

Classify the following elements as metals, nonmetals or semi-metals: 
S, Sb, Sc, Se, Sg, Si, Sm, Sn, and Sr.

Accepted Answer

Nonmetals: S, Se
Sem

Question 8

What will be the coefficient for HNO3 when the following equation is balanced?

Ba(OH)2(aq) + HNO3(aq) $\rightarrow$ Ba(NO3)2(aq) + H2O(l)

Accepted Answer

A)  1 
B)  2 
C)  3 
D)  5 
E)  none of these 
A)  1 
B)  2 
C)  3 
D)  5 
E)  none of these

Question 9

Complete the table

Accepted Answer

The answer of Complete the table 
  ...

Question 10

Which of the following correctly describes one of the differences between compounds and mixtures?

Accepted Answer

A)  Compounds contain more than one element but mixtures do not. 
B)  Compounds have a constant composition but mixtures do not. 
C)  It is easier to separate the elements in a compound than it is to separate the elements in a mixture. 
D)  All of these statements are true. 
E)  None of these statements are true. 
A)  Compounds contain more than one element but mixtures do not. 
B)  Compounds have a constant composition but mixtures do not. 
C)  It is easier to separate the elements in a compound than it is to separate the elements in a mixture. 
D)  All of these statements are true. 
E)  None of these statements are true.

Question 11

Calculate the number of electrons on a Ce4+ ion if the atomic number of this
Element is 58 and the mass number of the ion is 140.

Accepted Answer

A)  54 
B)  58 
C)  62 
D)  136 
E)  140 
A)  54 
B)  58 
C)  62 
D)  136 
E)  140

Question 12

Which of the following correctly describes a Zn2+ ion that has a mass number of 65?

Accepted Answer

A)  It contains 28 electrons, 30 protons, and 35 neutrons. 
B)  It contains 30 electrons, 30 protons, and 35 neutrons. 
C)  It contains 32 electrons, 30 protons, and 35 neutrons. 
D)  It contains 35 electrons, 35 protons, and 30 neutrons. 
E)  It contains 37 electrons, 35 protons, and 30 neutrons. 
A)  It contains 28 electrons, 30 protons, and 35 neutrons. 
B)  It contains 30 electrons, 30 protons, and 35 neutrons. 
C)  It contains 32 electrons, 30 protons, and 35 neutrons. 
D)  It contains 35 electrons, 35 protons, and 30 neutrons. 
E)  It contains 37 electrons, 35 protons, and 30 neutrons.

Question 13

How many protons are in 32S2-?

Accepted Answer

A)  2 
B)  14 
C)  16 
D)  18 
E)  32 
A)  2 
B)  14 
C)  16 
D)  18 
E)  32

Question 14

use the data listed below.

-If you were able to select 1000 individual atoms of oxygen from a naturally occurring sample, what would be the $\textbf{         average}$  mass of the atoms?

Accepted Answer

A)  15.9949 amu 
B)  16.9991 amu 
C)  17.9992 amu 
D)  15.9993 amu 
E)  none of these 
A)  15.9949 amu 
B)  16.9991 amu 
C)  17.9992 amu 
D)  15.9993 amu 
E)  none of these

Question 15

What is the symbol for the atom or ion that has 34 neutrons, 29 protons, and 27 electrons?

Accepted Answer

A)  34Se2 - 
B)  29Cu2+ 
C)  63Se2 - 
D)  63Cu2+ 
E)  27Co2+ 
A)  34Se2 - 
B)  29Cu2+ 
C)  63Se2 - 
D)  63Cu2+ 
E)  27Co2+

Question 16

How many electrons are present in the 136Ba2+ ion?

Accepted Answer

A)  56 
B)  58 
C)  78 
D)  134 
E)  none of these 
A)  56 
B)  58 
C)  78 
D)  134 
E)  none of these

Question 17

What will be the coefficient for NH3 when the following reaction is balanced?
NH3(g) + O2(g)  $\rightarrow$ N2(g) + H2O(l)

Accepted Answer

A)  1 
B)  3 
C)  4 
D)  5 
E)  none of these 
A)  1 
B)  3 
C)  4 
D)  5 
E)  none of these

Question 18

What is the symbol for the atom or ion that has 26 protons, 30 neutrons, and 24Electrons?

Accepted Answer

A)  56Cr2+ 
B)  54Cr2+ 
C)  56Fe2+ 
D)  54Fe3+ 
E)  54Cr 
A)  56Cr2+ 
B)  54Cr2+ 
C)  56Fe2+ 
D)  54Fe3+ 
E)  54Cr

Question 19

use the data listed below.
  
-If you select $\textbf{   100      }$  random atoms of Ne from a naturally occurring sample, their $\textbf{     total      }$mass is most likely to be

Accepted Answer

A)  1999.244 amu 
B)  2099.384 amu 
C)  2199.138 amu 
D)  2017.9 amu 
E)  2000.0 amu 
A)  1999.244 amu 
B)  2099.384 amu 
C)  2199.138 amu 
D)  2017.9 amu 
E)  2000.0 amu

How many electrons are present in the ⁷⁷Se^2- ion?

Calculate the number of electrons in a P^3- ion if the mass number of phosphorus is 31 and the atomic number of this element is 15.

Atoms are isobaric if they have the same mass. Which of the following atoms or ions are isobaric? (I) ⁵¹Cr³⁺ (II) ⁵²Cr³⁺ (III) ⁵⁵Mn³⁺ (IV) ⁵⁹Ni⁴⁺ (V) ⁵⁹Co³⁺

use the data listed below. $use the data listed below. -If you select a \textbf{ single } random atom of Ne from a naturally occurring sample, its mass is most likely to be$ -If you select a $\textbf{ single }$ random atom of Ne from a naturally occurring sample, its mass is most likely to be

How many electrons are in ⁵²Cr³⁺?

Complete the following table.

Classify the following elements as metals, nonmetals or semi-metals: S, Sb, Sc, Se, Sg, Si, Sm, Sn, and Sr.

What will be the coefficient for HNO₃ when the following equation is balanced? Ba(OH)₂(aq) + HNO₃(aq) $\rightarrow$ Ba(NO₃)₂(aq) + H₂O(l)

Complete the table

Which of the following correctly describes one of the differences between compounds and mixtures?

Calculate the number of electrons on a Ce⁴⁺ ion if the atomic number of this Element is 58 and the mass number of the ion is 140.

Which of the following correctly describes a Zn²⁺ ion that has a mass number of 65?

How many protons are in ³²S^2-?

What is the symbol for the atom or ion that has 34 neutrons, 29 protons, and 27 electrons?

How many electrons are present in the ¹³⁶Ba²⁺ ion?

What will be the coefficient for NH₃ when the following reaction is balanced? NH₃(g) + O₂(g) $\rightarrow$ N₂(g) + H₂O(l)

What is the symbol for the atom or ion that has 26 protons, 30 neutrons, and 24Electrons?

The Mole

Structure of the Atom

The Covalent Bond

Ionic and Metallic Bonds

Gases

Making and Breaking of Bonds

Liquids and Solutions

Solids

An Introduction to Kinetics and Equilibrium

Acids and Bases

Oxidation-Reduction Reactions

Chemical Thermodynamics

Kinetics

Nuclear Chemistry

Organic Chemistry

Filters

Exam 1: Elements Compounds

How many electrons are present in the 77Se2- ion?

Calculate the number of electrons in a P3- ion if the mass number of phosphorus is 31 and the atomic number of this element is 15.

Atoms are isobaric if they have the same mass. Which of the following atoms or ions are isobaric? (I) 51Cr3+ (II) 52Cr3+ (III) 55Mn3+ (IV) 59Ni4+ (V) 59Co3+

use the data listed below. -If you select a single \textbf{ single } single random atom of Ne from a naturally occurring sample, its mass is most likely to be

How many electrons are in 52Cr3+?

Complete the following table.

Classify the following elements as metals, nonmetals or semi-metals: S, Sb, Sc, Se, Sg, Si, Sm, Sn, and Sr.

What will be the coefficient for HNO3 when the following equation is balanced? Ba(OH)2(aq) + HNO3(aq) →\rightarrow→ Ba(NO3)2(aq) + H2O(l)

Complete the table

Which of the following correctly describes one of the differences between compounds and mixtures?

Calculate the number of electrons on a Ce4+ ion if the atomic number of this Element is 58 and the mass number of the ion is 140.

Which of the following correctly describes a Zn2+ ion that has a mass number of 65?

How many protons are in 32S2-?

use the data listed below. -If you were able to select 1000 individual atoms of oxygen from a naturally occurring sample, what would be the average\textbf{ average} average mass of the atoms?

What is the symbol for the atom or ion that has 34 neutrons, 29 protons, and 27 electrons?

How many electrons are present in the 136Ba2+ ion?

What will be the coefficient for NH3 when the following reaction is balanced? NH3(g) + O2(g) →\rightarrow→ N2(g) + H2O(l)

What is the symbol for the atom or ion that has 26 protons, 30 neutrons, and 24Electrons?

use the data listed below. -If you select 100 \textbf{ 100 } 100 random atoms of Ne from a naturally occurring sample, their total \textbf{ total } total mass is most likely to be

The Mole

Structure of the Atom

The Covalent Bond

Ionic and Metallic Bonds

Gases

Making and Breaking of Bonds

Liquids and Solutions

Solids

An Introduction to Kinetics and Equilibrium

Acids and Bases

Oxidation-Reduction Reactions

Chemical Thermodynamics

Kinetics

Nuclear Chemistry

Organic Chemistry

Filters

How many electrons are present in the ⁷⁷Se^2- ion?

Calculate the number of electrons in a P^3- ion if the mass number of phosphorus is 31 and the atomic number of this element is 15.

Atoms are isobaric if they have the same mass. Which of the following atoms or ions are isobaric? (I) ⁵¹Cr³⁺ (II) ⁵²Cr³⁺ (III) ⁵⁵Mn³⁺ (IV) ⁵⁹Ni⁴⁺ (V) ⁵⁹Co³⁺

use the data listed below. $use the data listed below. -If you select a \textbf{ single } random atom of Ne from a naturally occurring sample, its mass is most likely to be$ -If you select a $\textbf{ single }$ random atom of Ne from a naturally occurring sample, its mass is most likely to be

How many electrons are in ⁵²Cr³⁺?

What will be the coefficient for HNO₃ when the following equation is balanced? Ba(OH)₂(aq) + HNO₃(aq) $\rightarrow$ Ba(NO₃)₂(aq) + H₂O(l)

Calculate the number of electrons on a Ce⁴⁺ ion if the atomic number of this Element is 58 and the mass number of the ion is 140.

Which of the following correctly describes a Zn²⁺ ion that has a mass number of 65?

How many protons are in ³²S^2-?

How many electrons are present in the ¹³⁶Ba²⁺ ion?

What will be the coefficient for NH₃ when the following reaction is balanced? NH₃(g) + O₂(g) $\rightarrow$ N₂(g) + H₂O(l)