Question 1

Which subatomic particle has the LOWEST mass?

Accepted Answer

A)  a proton 
B)  a neutron 
C)  an electron 
D)  All of these subatomic particles have equal masses. 
A)  a proton 
B)  a neutron 
C)  an electron 
D)  All of these subatomic particles have equal masses.

Question 2

Which of these symbols represents an atom with 15 protons,16 neutrons,and 15 electrons?

Accepted Answer

A)    
B)    
C)    
D)    
A)    
B)    
C)    
D)

Question 3

Which elements are in the same group?

Accepted Answer

A)  K,Ca,and Mg 
B)  Li,Na,and Cs 
C)  F,S,and N 
D)  C,Si,and N 
A)  K,Ca,and Mg 
B)  Li,Na,and Cs 
C)  F,S,and N 
D)  C,Si,and N

Question 4

Which symbol BEST represents a potassium cation?

Accepted Answer

A)  K- 
B)  K+ 
C)  K 
D)  K(cat) 
A)  K- 
B)  K+ 
C)  K 
D)  K(cat)

Question 5

Which statement is NOT accurate concerning Dalton's atomic theory?

Accepted Answer

A)  Elements are made of tiny,indivisible particles called atoms. 
B)  The atoms of each element are unique. 
C)  Atoms can join together in whole-number ratios to form compounds. 
D)  Atoms are changed in chemical reactions. 
A)  Elements are made of tiny,indivisible particles called atoms. 
B)  The atoms of each element are unique. 
C)  Atoms can join together in whole-number ratios to form compounds. 
D)  Atoms are changed in chemical reactions.

Question 6

Which subatomic particle has the GREATEST mass?

Accepted Answer

A)  a proton 
B)  a neutron 
C)  an electron 
D)  All of these subatomic particles have equal masses. 
A)  a proton 
B)  a neutron 
C)  an electron 
D)  All of these subatomic particles have equal masses.

Question 7

Water has the formula H2O.Water can be made from the reaction of hydrogen and oxygen.If 2.0 g of hydrogen reacts fully with 2.0 g of oxygen,then _____ of water is made.

Accepted Answer

A)  2.0 g 
B)  3.0 g 
C)  4.0 g 
D)  6.0 g 
A)  2.0 g 
B)  3.0 g 
C)  4.0 g 
D)  6.0 g

Question 8

An atom has atomic number 92 and mass number 238.Which symbol is an ISOTOPE of this atom?

Accepted Answer

A)    
B)    
C)    
D)    
A)    
B)    
C)    
D)

Question 9

F,Cl,and Br all belong to what family?

Accepted Answer

A)  alkali metals 
B)  transition metals 
C)  halogens 
D)  noble gases 
A)  alkali metals 
B)  transition metals 
C)  halogens 
D)  noble gases

Question 10

A certain element is composed of two isotopes,having the mass and abundance shown in the table.What is the average atomic mass for this element? Mass
Abundance
Isotope 1
35.0 u
75.8%
Isotope 2
37.0 u
24.2%

Accepted Answer

A)  36.0 u 
B)  35.5 u 
C)  37.0 u 
D)  921.9 u 
A)  36.0 u 
B)  35.5 u 
C)  37.0 u 
D)  921.9 u

Which subatomic particle has the LOWEST mass?

Which of these symbols represents an atom with 15 protons,16 neutrons,and 15 electrons?

Which elements are in the same group?

Which symbol BEST represents a potassium cation?

Which statement is NOT accurate concerning Dalton's atomic theory?

Which subatomic particle has the GREATEST mass?

Water has the formula H₂O.Water can be made from the reaction of hydrogen and oxygen.If 2.0 g of hydrogen reacts fully with 2.0 g of oxygen,then _____ of water is made.

An atom has atomic number 92 and mass number 238.Which symbol is an ISOTOPE of this atom?

F,Cl,and Br all belong to what family?

A certain element is composed of two isotopes,having the mass and abundance shown in the table.What is the average atomic mass for this element? Mass Abundance Isotope 1 35.0 u 75.8% Isotope 2 37.0 u 24.2%

Foundations

Measurement

Light and Electronic Structure

Chemical Bonds Compounds

Chemical Reactions

Mass Stoichiometry

Energy

Covalent Bonding and Molecules

Solids, Liquids, and Gases

Solutions

Acids Bases

Reaction Rates Equilibrium

Oxidation-Reduction Reactions

Organic Chemistry and Biomolecules

Nuclear Chemistry

Filters

Exam 3: Atoms

Which subatomic particle has the LOWEST mass?

Which of these symbols represents an atom with 15 protons,16 neutrons,and 15 electrons?

Which elements are in the same group?

Which symbol BEST represents a potassium cation?

Which statement is NOT accurate concerning Dalton's atomic theory?

Which subatomic particle has the GREATEST mass?

Water has the formula H2O.Water can be made from the reaction of hydrogen and oxygen.If 2.0 g of hydrogen reacts fully with 2.0 g of oxygen,then _____ of water is made.

An atom has atomic number 92 and mass number 238.Which symbol is an ISOTOPE of this atom?

F,Cl,and Br all belong to what family?

A certain element is composed of two isotopes,having the mass and abundance shown in the table.What is the average atomic mass for this element? Mass Abundance Isotope 1 35.0 u 75.8% Isotope 2 37.0 u 24.2%

Foundations

Measurement

Light and Electronic Structure

Chemical Bonds Compounds

Chemical Reactions

Mass Stoichiometry

Energy

Covalent Bonding and Molecules

Solids, Liquids, and Gases

Solutions

Acids Bases

Reaction Rates Equilibrium

Oxidation-Reduction Reactions

Organic Chemistry and Biomolecules

Nuclear Chemistry

Filters

Water has the formula H₂O.Water can be made from the reaction of hydrogen and oxygen.If 2.0 g of hydrogen reacts fully with 2.0 g of oxygen,then _____ of water is made.