Question 1

Isotopes of an element have the same number of protons but a different number of neutrons.

Accepted Answer

A) True 
 B)False

Question 2

The proton has

Accepted Answer

A) the same mass and charge as the electron. 
B) a smaller mass and same charge as the electron. 
C) a smaller mass and opposite charge as the electron. 
D) a larger mass and opposite charge as the electron. 
A) the same mass and charge as the electron. 
B) a smaller mass and same charge as the electron. 
C) a smaller mass and opposite charge as the electron. 
D) a larger mass and opposite charge as the electron.

Question 3

Which orbital will have the highest energy?

Accepted Answer

A) 3d 
B) 3p 
C) 4s 
D) 2p 
A) 3d 
B) 3p 
C) 4s 
D) 2p

Question 4

The model for the atom which has electrons in fixed orbits was developed by

Accepted Answer

A) Rutherford. 
B) Schrödinger. 
C) Bohr. 
D) Einstein. 
A) Rutherford. 
B) Schrödinger. 
C) Bohr. 
D) Einstein.

Question 5

Radioactivity is the spontaneous emission of radiation from an unstable element.

Accepted Answer

A) True 
 B)False

Question 6

The number of protons in an atom is called the

Accepted Answer

A) atomic mass. 
B) atomic number. 
C) atomic weight. 
D) mass number. 
A) atomic mass. 
B) atomic number. 
C) atomic weight. 
D) mass number.

Question 7

Iodine has ________ valence electrons.

Accepted Answer

A) three 
B) five 
C) seven 
D) eight 
A) three 
B) five 
C) seven 
D) eight

Question 8

Radioactivity is

Accepted Answer

A) the spontaneous emission of radiation from unstable elements. 
B) the emission of light from certain substances after exposure to sunlight. 
C) the spontaneous emission of radio waves from matter. 
D) the emission of light from matter when exposed to radio waves. 
A) the spontaneous emission of radiation from unstable elements. 
B) the emission of light from certain substances after exposure to sunlight. 
C) the spontaneous emission of radio waves from matter. 
D) the emission of light from matter when exposed to radio waves.

Question 9

Which statement best summarizes the general nature of investigations during the 1800s related to the acquisition and development of knowledge that provided glimpses into the atomic structure of matter?

Accepted Answer

A) Qualitative observations, influenced by ideas related to magic and mysticism, provide glimpses of the structure of matter. 
B) Quantitative measurements of studies of compounds with fire, lead to the formulation of fundamental laws leading to an atomic theory of matter. 
C) Electricity played an important role in unraveling the structure of the atom. 
D) New experimental and mathematical techniques provided information concerning the organization of subatomic particles in atoms. 
A) Qualitative observations, influenced by ideas related to magic and mysticism, provide glimpses of the structure of matter. 
B) Quantitative measurements of studies of compounds with fire, lead to the formulation of fundamental laws leading to an atomic theory of matter. 
C) Electricity played an important role in unraveling the structure of the atom. 
D) New experimental and mathematical techniques provided information concerning the organization of subatomic particles in atoms.

Question 10

Which element is in the same group as sodium?

Accepted Answer

A) Cl 
B) K 
C) Mg 
D) Si 
A) Cl 
B) K 
C) Mg 
D) Si

Question 11

All of the following types of radiation will be deflected either by a magnetic field or electricity EXCEPT

Accepted Answer

A) alpha, α. 
B) beta, β. 
C) gamma, γ. 
D) electrons. 
A) alpha, α. 
B) beta, β. 
C) gamma, γ. 
D) electrons.

Question 12

How many protons are there in a phosphorus atom?

Accepted Answer

A) 31 
B) 15 
C) 17 
D) 46 
A) 31 
B) 15 
C) 17 
D) 46

Question 13

By measuring the deflection of cathode rays in electrical and magnetic fields,J.J.Thomson was able to determine the

Accepted Answer

A) mass of the electron. 
B) speed of the electron. 
C) charge on the electron. 
D) ratio of mass to charge for the electron. 
A) mass of the electron. 
B) speed of the electron. 
C) charge on the electron. 
D) ratio of mass to charge for the electron.

Question 14

Current methods of converting solar energy into electricity use inexpensive materials.

Accepted Answer

A) True 
 B)False

Question 15

An orbital is a region in space in which there is a high probability of finding an electron.

Accepted Answer

A) True 
 B)False

Question 16

The difference in mass between protons and neutrons is generally regarded as

Accepted Answer

A) significant. 
B) insignificant. 
C) unknown. 
D) variable. 
A) significant. 
B) insignificant. 
C) unknown. 
D) variable.

Question 17

A horizontal row in the modern periodic table is called a

Accepted Answer

A) period. 
B) group. 
C) branch. 
D) valence. 
A) period. 
B) group. 
C) branch. 
D) valence.

Question 18

When an electron moves from the ground state to the excited state,it

Accepted Answer

A) absorbs energy and moves closer to the nucleus. 
B) absorbs energy and moves farther from the nucleus. 
C) emits energy and moves closer to the nucleus. 
D) emits energy and moves farther from the nucleus. 
A) absorbs energy and moves closer to the nucleus. 
B) absorbs energy and moves farther from the nucleus. 
C) emits energy and moves closer to the nucleus. 
D) emits energy and moves farther from the nucleus.

Question 19

Solar fuels such as hydrogen are being studied as sources of energy.All of the following statements about hydrogen as a fuel source are true EXCEPT

Accepted Answer

A) Fuels that are produced using sunlight as the energy source and water as the chemical feedstock are clean and renewable. 
B) Solar-hydrogen systems use materials that are abundant and do not harm the environment. 
C) Significant amounts of carbon dioxide would be emitted. 
D) Solar-hydrogen systems rely on compounds that increase efficiency. 
A) Fuels that are produced using sunlight as the energy source and water as the chemical feedstock are clean and renewable. 
B) Solar-hydrogen systems use materials that are abundant and do not harm the environment. 
C) Significant amounts of carbon dioxide would be emitted. 
D) Solar-hydrogen systems rely on compounds that increase efficiency.

Question 20

Which element is an alkaline earth metal?

Accepted Answer

A) Ba 
B) F 
C) Rb 
D) Ar 
A) Ba 
B) F 
C) Rb 
D) Ar

Exam 3: Atomic Structure

Isotopes of an element have the same number of protons but a different number of neutrons.

The proton has

Which orbital will have the highest energy?

The model for the atom which has electrons in fixed orbits was developed by

Radioactivity is the spontaneous emission of radiation from an unstable element.

The number of protons in an atom is called the

Iodine has ________ valence electrons.

Radioactivity is

Which statement best summarizes the general nature of investigations during the 1800s related to the acquisition and development of knowledge that provided glimpses into the atomic structure of matter?

Which element is in the same group as sodium?

All of the following types of radiation will be deflected either by a magnetic field or electricity EXCEPT

How many protons are there in a phosphorus atom?

By measuring the deflection of cathode rays in electrical and magnetic fields,J.J.Thomson was able to determine the

Current methods of converting solar energy into electricity use inexpensive materials.

An orbital is a region in space in which there is a high probability of finding an electron.

The difference in mass between protons and neutrons is generally regarded as

A horizontal row in the modern periodic table is called a

When an electron moves from the ground state to the excited state,it

Solar fuels such as hydrogen are being studied as sources of energy.All of the following statements about hydrogen as a fuel source are true EXCEPT

Which element is an alkaline earth metal?

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