Question 1

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

Accepted Answer

Isotopes only differ in the number of neutrons contained within the nucleus.Since the size of an atom is determined by the electrons,isotopes of the same element should be the same size.

Question 2

What group of elements in the periodic table are the most unreactive and why?

Accepted Answer

The noble gases are the most unreactive since they do not combine with other elements to form compounds.

Question 3

An atom of 131Xe contains ________ electrons.

Accepted Answer

A) 131 
B) 185 
C) 77 
D) 123 
E) 54 
A) 131 
B) 185 
C) 77 
D) 123 
E) 54 E

Question 4

Which of the following elements is a metal?

Accepted Answer

A) As 
B) C 
C) I 
D) Sn 
E) Se 
A) As 
B) C 
C) I 
D) Sn 
E) Se

Question 5

The mass number is equal to

Accepted Answer

A) the sum of the sum of the electrons and protons. 
B) the sum of the sum of the neutrons and electrons. 
C) the sum of the number of protons,neutrons,and electrons. 
D) the sum of the number of protons and neutrons. 
A) the sum of the sum of the electrons and protons. 
B) the sum of the sum of the neutrons and electrons. 
C) the sum of the number of protons,neutrons,and electrons. 
D) the sum of the number of protons and neutrons.

Question 6

Which of the following elements is a halogen?

Accepted Answer

A) Ne 
B) I 
C) O 
D) Mg 
E) K 
A) Ne 
B) I 
C) O 
D) Mg 
E) K

Question 7

Cesium belongs to the ________ group of the periodic table.

Accepted Answer

A) alkali metal 
B) alkaline earth metal 
C) halogen 
D) noble gas 
A) alkali metal 
B) alkaline earth metal 
C) halogen 
D) noble gas

Question 8

Which of the following elements is not a metal?

Accepted Answer

A) Ba 
B) Mg 
C) Xe 
D) Pb 
E) Ga 
A) Ba 
B) Mg 
C) Xe 
D) Pb 
E) Ga

Question 9

Describe the difference between ions and isotopes.

Accepted Answer

Ions have the loss o

Question 10

What is the chemical symbol for copper?

Accepted Answer

A) Co 
B) Cr 
C) Cu 
D) C 
A) Co 
B) Cr 
C) Cu 
D) C

Question 11

What element is defined by the following information?
P+ = 17 n° = 20 e- = 17

Accepted Answer

A) calcium 
B) rubidium 
C) chlorine 
D) neon 
E) oxygen 
A) calcium 
B) rubidium 
C) chlorine 
D) neon 
E) oxygen

Question 12

Predict the charge that an aluminum ion would have.

Accepted Answer

A) 5- 
B) 1+ 
C) 1- 
D) 2+ 
E) 3+ 
A) 5- 
B) 1+ 
C) 1- 
D) 2+ 
E) 3+

Question 13

What mass,in mg,does 2.63 moles of nickel have?

Accepted Answer

A) 44.8 mg 
B) 2.23 × 104 mg 
C) 129 mg 
D) 3.56 × 105 mg 
E) 1.54 × 105 mg 
A) 44.8 mg 
B) 2.23 × 104 mg 
C) 129 mg 
D) 3.56 × 105 mg 
E) 1.54 × 105 mg

Question 14

Describe an atom and what it is made up of according to modern atomic theory.

Accepted Answer

An atom is made up of a nucleus surround

Question 15

Calculate the atomic mass of element "X",if it has 2 naturally occurring isotopes with the following masses and natural abundances: X-45 44.8776 amu 32.88%
X-47 46.9443 amu 67.12%

Accepted Answer

A) 46.26 amu 
B) 45.91 amu 
C) 46.34 amu 
D) 46.84 amu 
E) 44.99 amu 
A) 46.26 amu 
B) 45.91 amu 
C) 46.34 amu 
D) 46.84 amu 
E) 44.99 amu

Question 16

How many electrons are in nickel?

Accepted Answer

A) 28 
B) 30 
C) 31 
D) 30.7 
E) 58.7 
A) 28 
B) 30 
C) 31 
D) 30.7 
E) 58.7

Question 17

How many protons (p)and neutrons (n)are in an atom  Sr?

Accepted Answer

A) 38 p,52 n 
B) 38 p,90 n 
C) 52 p,38 n 
D) 90 p,38 n 
A) 38 p,52 n 
B) 38 p,90 n 
C) 52 p,38 n 
D) 90 p,38 n

Question 18

What is the chemical symbol for mercury?

Accepted Answer

A) Ag 
B) Au 
C) Hg 
D) Pb 
A) Ag 
B) Au 
C) Hg 
D) Pb

Question 19

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 20

What element is defined by the following information?
P+ = 11 n° = 12 e- = 11

Accepted Answer

A) sodium 
B) vanadium 
C) magnesium 
D) titanium 
A) sodium 
B) vanadium 
C) magnesium 
D) titanium

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

What group of elements in the periodic table are the most unreactive and why?

An atom of ¹³¹Xe contains ________ electrons_.

Which of the following elements is a metal?

The mass number is equal to

Which of the following elements is a halogen?

Cesium belongs to the ________ group of the periodic table.

Which of the following elements is not a metal?

Describe the difference between ions and isotopes.

What is the chemical symbol for copper?

What element is defined by the following information? P⁺ = 17 n° = 20 e^- = 17

Predict the charge that an aluminum ion would have.

What mass,in mg,does 2.63 moles of nickel have?

Describe an atom and what it is made up of according to modern atomic theory.

Calculate the atomic mass of element "X",if it has 2 naturally occurring isotopes with the following masses and natural abundances: X-45 44.8776 amu 32.88% X-47 46.9443 amu 67.12%

How many electrons are in nickel?

How many protons (p)and neutrons (n)are in an atom ofSr?

What is the chemical symbol for mercury?

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

What element is defined by the following information? P⁺ = 11 n° = 12 e^- = 11

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, and

Liquids, Solids, and Intermolecular Forces

Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases

Aqueous Ionic Equilibrium

Free Energy and Thermodynamics

Electrochemistry

Radioactivity and Nuclear Chemistry

Filters

Exam 2: Atoms and Elements

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

What group of elements in the periodic table are the most unreactive and why?

An atom of 131Xe contains ________ electrons.

Which of the following elements is a metal?

The mass number is equal to

Which of the following elements is a halogen?

Cesium belongs to the ________ group of the periodic table.

Which of the following elements is not a metal?

Describe the difference between ions and isotopes.

What is the chemical symbol for copper?

What element is defined by the following information? P+ = 17 n° = 20 e- = 17

Predict the charge that an aluminum ion would have.

What mass,in mg,does 2.63 moles of nickel have?

Describe an atom and what it is made up of according to modern atomic theory.

Calculate the atomic mass of element "X",if it has 2 naturally occurring isotopes with the following masses and natural abundances: X-45 44.8776 amu 32.88% X-47 46.9443 amu 67.12%

How many electrons are in nickel?

How many protons (p)and neutrons (n)are in an atom ofSr?

What is the chemical symbol for mercury?

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

What element is defined by the following information? P+ = 11 n° = 12 e- = 11

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, and

Liquids, Solids, and Intermolecular Forces

Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases

Aqueous Ionic Equilibrium

Free Energy and Thermodynamics

Electrochemistry

Radioactivity and Nuclear Chemistry

Filters

An atom of ¹³¹Xe contains ________ electrons_.

What element is defined by the following information? P⁺ = 17 n° = 20 e^- = 17

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

What element is defined by the following information? P⁺ = 11 n° = 12 e^- = 11