Question 1

What is the term for the number of protons in the nucleus of each atom of an element? It also indicates the number of electrons in the atom.

Accepted Answer

A) Isotope number 
B) Mass number 
C) Mass-to-charge ratio 
D) Atomic number 
E) Atomic mass units 
A) Isotope number 
B) Mass number 
C) Mass-to-charge ratio 
D) Atomic number 
E) Atomic mass units

Question 2

Almost all the mass of an atom is concentrated in the nucleus.

Accepted Answer

A) True 
 B)False

Question 3

Which group is given the name chalcogens?

Accepted Answer

The answer of Which group is given the name chalcogens?...

Question 4

Diiodine pentaoxide is used as an oxidizing agent that converts carbon monoxide to carbon dioxide.What is its chemical formula?

Accepted Answer

A) I2O5 
B) IO5 
C) 2IO5 
D) I5O2 
E) (IO5)2 
A) I2O5 
B) IO5 
C) 2IO5 
D) I5O2 
E) (IO5)2

Question 5

What name is given to the simplest organic compounds which only contain carbons and hydrogens?

Accepted Answer

The answer of What name is given to the simplest...

Question 6

What is the name given for the elements in Group 7A in the periodic table?

Accepted Answer

The answer of What is the name given for the...

Question 7

Polyatomic molecules contain

Accepted Answer

A) two different types of atoms. 
B) two of the same types of atoms. 
C) only two atoms of the same or different type. 
D) more than two atoms of the same or different type. 
A) two different types of atoms. 
B) two of the same types of atoms. 
C) only two atoms of the same or different type. 
D) more than two atoms of the same or different type.

Question 8

Bromine is the only nonmetal that is a liquid at room temperature.Consider the isotope bromine-81,   .Select the combination which lists the correct atomic number,number of neutrons,and mass number,respectively.

Accepted Answer

A) 35,46,81 
B) 35,81,46 
C) 81,46,35 
D) 46,81,35 
E) 35,81,116 
A) 35,46,81 
B) 35,81,46 
C) 81,46,35 
D) 46,81,35 
E) 35,81,116

Question 9

Copper (Cu)is a transition metal.

Accepted Answer

A) True 
 B)False

Question 10

Tetrasulfur dinitride decomposes explosively when heated.What is its formula?

Accepted Answer

A) S2N4 
B) S4N2 
C) 4SN2 
D) S4N 
E) S2N 
A) S2N4 
B) S4N2 
C) 4SN2 
D) S4N 
E) S2N

Question 11

What is the name of PCl3?

Accepted Answer

A) phosphorus chloride 
B) phosphoric chloride 
C) phosphorus trichlorate 
D) trichlorophosphide 
E) phosphorus trichloride 
A) phosphorus chloride 
B) phosphoric chloride 
C) phosphorus trichlorate 
D) trichlorophosphide 
E) phosphorus trichloride

Question 12

_____________ have properties that are intermediate between those of metals and nonmetals.

Accepted Answer

The answer of _____________ have properties that are intermediate between...

Question 13

______________ are electrons that are deflected away from negatively charged plates.

Accepted Answer

The answer of ______________ are electrons that are deflected away...

Question 14

The empirical formula is the simplest whole number ratio of atoms representing a chemical formula of a molecule.

Accepted Answer

A) True 
 B)False

Question 15

Which of the following is a type of radioactive radiation that has no charge and is unaffected by external electric or magnetic fields?

Accepted Answer

A) α rays 
B) β rays 
C) γ rays 
D) δ rays 
E) ε rays 
A) α rays 
B) β rays 
C) γ rays 
D) δ rays 
E) ε rays

Question 16

The elements in Group 7A are known by what name?

Accepted Answer

A) Transition metals 
B) Halogens 
C) Alkali metals 
D) Alkaline earth metals 
E) Noble gases 
A) Transition metals 
B) Halogens 
C) Alkali metals 
D) Alkaline earth metals 
E) Noble gases

Question 17

What is the law that describes different samples of a given compound that always contain the same elements in the same mass ratio?

Accepted Answer

law of def

Question 18

The 80Br- ion has

Accepted Answer

A) 45 protons,35 neutrons,45 electrons. 
B) 35 protons,45 neutrons,34 electrons. 
C) 35 protons,45 neutrons,36 electrons. 
D) 45 protons,35 neutrons,46 electrons. 
E) 35 protons,45 neutrons,46 electrons. 
A) 45 protons,35 neutrons,45 electrons. 
B) 35 protons,45 neutrons,34 electrons. 
C) 35 protons,45 neutrons,36 electrons. 
D) 45 protons,35 neutrons,46 electrons. 
E) 35 protons,45 neutrons,46 electrons.

Question 19

Ferric oxide is used as a pigment in metal polishing.Which of the following is its formula?

Accepted Answer

A) FeO 
B) Fe2O 
C) FeO3 
D) Fe2O5 
E) Fe2O3 
A) FeO 
B) Fe2O 
C) FeO3 
D) Fe2O5 
E) Fe2O3

Question 20

Which is the correct formula for copper(II)phosphate?

Accepted Answer

A) Cu2PO4 
B) Cu3(PO4)2 
C) Cu2PO3 
D) Cu(PO4)2 
E) Cu(PO3)2 
A) Cu2PO4 
B) Cu3(PO4)2 
C) Cu2PO3 
D) Cu(PO4)2 
E) Cu(PO3)2

Exam 2: Atoms Molecules and Ions

What is the term for the number of protons in the nucleus of each atom of an element? It also indicates the number of electrons in the atom.

Almost all the mass of an atom is concentrated in the nucleus.

Which group is given the name chalcogens?

Diiodine pentaoxide is used as an oxidizing agent that converts carbon monoxide to carbon dioxide.What is its chemical formula?

What name is given to the simplest organic compounds which only contain carbons and hydrogens?

What is the name given for the elements in Group 7A in the periodic table?

Polyatomic molecules contain

Bromine is the only nonmetal that is a liquid at room temperature.Consider the isotope bromine-81, .Select the combination which lists the correct atomic number,number of neutrons,and mass number,respectively.

Copper (Cu)is a transition metal.

Tetrasulfur dinitride decomposes explosively when heated.What is its formula?

What is the name of PCl3?

_____________ have properties that are intermediate between those of metals and nonmetals.

______________ are electrons that are deflected away from negatively charged plates.

The empirical formula is the simplest whole number ratio of atoms representing a chemical formula of a molecule.

Which of the following is a type of radioactive radiation that has no charge and is unaffected by external electric or magnetic fields?

The elements in Group 7A are known by what name?

What is the law that describes different samples of a given compound that always contain the same elements in the same mass ratio?

The 80Br- ion has

Ferric oxide is used as a pigment in metal polishing.Which of the following is its formula?

Which is the correct formula for copper(II)phosphate?

Chemistry: the Central Science

Stoichiometry Ratios of Combination

Reactions in Aqueous Solutions

Thermochemistry

Quantum Theory and the Electronic Structure of Atoms

Electron Configuration and the Periodic Table

Chemical Bonding I Basic Concepts

Chemical Bonding Ii Molecular Geometry and Bonding Theories

Gases

Intermolecular Forces and the Physical Properties of Liquids and Solids

Modern Materials

Physical Properties of Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases

Acid-Base Equilibria and Solubility Equilibria

Entropy Free Energy and Equilibrium

Electrochemistry

Nuclear Chemistry

Environmental Chemistry

Coordination Chemistry

Metallurgy and the Chemistry of Metals

Nonmetallic Elements and Their Compounds

Organic Chemistry

Filters

What is the name of PCl₃?

The ⁸⁰Br^- ion has