Question 1

What mass (in g)does 0.990 moles of Kr have?

Accepted Answer

A)  83.5 g 
B)  119 g 
C)  52.8 g 
D)  60.0 g 
E)  35.6 g 
A)  83.5 g 
B)  119 g 
C)  52.8 g 
D)  60.0 g 
E)  35.6 g A

Question 2

How many electrons are in the ion,S2-?

Accepted Answer

A)  14 
B)  18 
C)  30 
D)  34 
E)  23 
A)  14 
B)  18 
C)  30 
D)  34 
E)  23 B

Question 3

Sodium belongs to the ________ group of the periodic table.

Accepted Answer

A)  alkali metal 
B)  transition element 
C)  noble gas 
D)  nonmetal 
A)  alkali metal 
B)  transition element 
C)  noble gas 
D)  nonmetal A

Question 4

Identify the charges of the protons,neutrons,and electrons.

Accepted Answer

A)  protons +1, neutrons 0, electrons -1 
B)  protons 0, neutrons -1, electrons 0 
C)  protons -1, neutrons -1, electrons 0 
D)  protons 0, neutrons 0, electrons 0 
E)  protons +1, neutrons +1, electrons +1 
A)  protons +1, neutrons 0, electrons -1 
B)  protons 0, neutrons -1, electrons 0 
C)  protons -1, neutrons -1, electrons 0 
D)  protons 0, neutrons 0, electrons 0 
E)  protons +1, neutrons +1, electrons +1

Question 5

Which of the following elements is a alkali metal?

Accepted Answer

A)  U 
B)  C 
C)  F 
D)  K 
E)  Ca 
A)  U 
B)  C 
C)  F 
D)  K 
E)  Ca

Question 6

Identify the cation.

Accepted Answer

A)  O2- 
B)  Sr2+ 
C)  Br 
D)  Kr 
E)  I2 
A)  O2- 
B)  Sr2+ 
C)  Br 
D)  Kr 
E)  I2

Question 7

Predict the charge of the most stable ion of sodium.

Accepted Answer

A)  1+ 
B)  3- 
C)  4+ 
D)  5+ 
E)  6+ 
A)  1+ 
B)  3- 
C)  4+ 
D)  5+ 
E)  6+

Question 8

Which of the following elements is a gas at room temperature?

Accepted Answer

A)  oxygen 
B)  boron 
C)  bromine 
D)  sodium 
E)  barium 
A)  oxygen 
B)  boron 
C)  bromine 
D)  sodium 
E)  barium

Question 9

How many protons does the As3- ion possess?

Accepted Answer

A)  30 
B)  36 
C)  4 
D)  8 
E)  33 
A)  30 
B)  36 
C)  4 
D)  8 
E)  33

Question 10

The atomic number is equal to the number of ________.

Accepted Answer

The answer of The atomic number is equal to the...

Question 11

Which of the following statements about isotopes is TRUE?

Accepted Answer

A)  Isotopes of the same element differ only in the number of electrons they contain. 
B)  An isotope of an atom with a larger number of neutrons is larger than an isotope of the same atom that contains fewer neutrons. 
C)  Isotopes of the same element have the same mass. 
D)  Isotopes of the same element don't usually have the same properties. 
E)  Some elements have 3 or more naturally occurring isotopes. 
A)  Isotopes of the same element differ only in the number of electrons they contain. 
B)  An isotope of an atom with a larger number of neutrons is larger than an isotope of the same atom that contains fewer neutrons. 
C)  Isotopes of the same element have the same mass. 
D)  Isotopes of the same element don't usually have the same properties. 
E)  Some elements have 3 or more naturally occurring isotopes.

Question 12

Identify an anion.

Accepted Answer

A)  an atom that has lost an electron 
B)  an atom that has gained an electron 
C)  an atom that has lost a proton 
D)  an atom that has gained a neutron and a proton 
A)  an atom that has lost an electron 
B)  an atom that has gained an electron 
C)  an atom that has lost a proton 
D)  an atom that has gained a neutron and a proton

Question 13

How many electrons are in the ion,Ni2+?

Accepted Answer

A)  26 
B)  28 
C)  30 
D)  59 
E)  52 
A)  26 
B)  28 
C)  30 
D)  59 
E)  52

Question 14

Match between columns
                        Premises: potassium
iron
magnesium
silicon
carbon

Accepted Answer

The Answer of Mg and K and Fe and C is...

Question 15

The number 6.022 × 1023 is called ________.

Accepted Answer

Question 16

What element is defined by the following information? p+ = 20 n° = 20 e- = 20

Accepted Answer

A)  zirconium 
B)  calcium 
C)  potassium 
D)  neon 
E)  argon 
A)  zirconium 
B)  calcium 
C)  potassium 
D)  neon 
E)  argon

Question 17

Give the name of the instrument that is used to measure masses of atoms and the percent abundance of isotopes.

Accepted Answer

The answer of Give the name of the instrument that...

Question 18

Why do the isotopes of the same element have the same atomic size?

Accepted Answer

Isotopes only differ in the nu

Question 19

Give the symbol for potassium.

Accepted Answer

A)  K 
B)  P 
C)  Po 
D)  Ka 
E)  Pt 
A)  K 
B)  P 
C)  Po 
D)  Ka 
E)  Pt

Question 20

Give an example of an halogen.

Accepted Answer

The answer of Give an example of an halogen....

Exam 2: Atoms and Elements

What mass (in g)does 0.990 moles of Kr have?

How many electrons are in the ion,S2-?

Sodium belongs to the ________ group of the periodic table.

Identify the charges of the protons,neutrons,and electrons.

Which of the following elements is a alkali metal?

Identify the cation.

Predict the charge of the most stable ion of sodium.

Which of the following elements is a gas at room temperature?

How many protons does the As3- ion possess?

The atomic number is equal to the number of ________.

Which of the following statements about isotopes is TRUE?

Identify an anion.

How many electrons are in the ion,Ni2+?

The number 6.022 × 1023 is called ________.

What element is defined by the following information? p+ = 20 n° = 20 e- = 20

Give the name of the instrument that is used to measure masses of atoms and the percent abundance of isotopes.

Why do the isotopes of the same element have the same atomic size?

Give the symbol for potassium.

Give an example of an halogen.

Matter, measurement, and Problem Solving

Molecules,compounds,and Chemical Equations

Chemical Quantities and Aqueous Reactions

Gases

Thermochemistry

The Quantum-Mechanical Model of the Atom

Periodic Properties of the Elements

Chemical Bonding I: Lewis Theory

Chemical Bonding Ii: Molecular Shapes,valence Bond Theory,

Liquids,solids,and Intermolecular Forces

Solids and Modern Materials

Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases

Aqueous Ionic Equilibrium

Free Energy and Thermodynamics

Electrochemistry

Radioactivity and Nuclear Chemistry

Organic Chemistry

Biochemistry

Chemistry of the Nonmetals

Metals and Metallurgy

Transition Metals and Coordination Compounds

Filters

How many electrons are in the ion,S^2-?

How many protons does the As^3- ion possess?

How many electrons are in the ion,Ni²⁺?

The number 6.022 × 10²³ is called ________.

What element is defined by the following information? p⁺ = 20 n° = 20 e^- = 20