Additional Atomic Review

1)a proton2)an electron

3)a helium atom4)a hydrogen atom

1.Which particle has the least mass?

1)The nucleus contains positively charged

electrons.

2)The nucleus contains negatively charged

protons.

3)The nucleus has a positive charge and is

surrounded by negatively charged

electrons.

4)The nucleus has a negative charge and is

surrounded by positively charged electrons.

2.Which statement describes the structure of an

atom?

1)A neutral nucleus is surrounded by one or

more negatively charged electrons.

2)A neutral nucleus is surrounded by one or

more positively charged electrons.

3)A positively charged nucleus is surrounded

by one or more negatively charged

electrons.

4)A positively charged nucleus is surrounded by

one or more positively charged electrons.

3.Which statement describes the distribution of

charge in an atom?

1)An atom is mostly empty space with a

dense, positively charged nucleus.

2)An atom is composed of at least three types of

subatomic particles.

3)An electron has a positive charge and is

located inside the nucleus.

4)An electron has properties of both waves and

particles.

4.Which conclusion was a direct result of the gold

foil experiment?

1)atomic mass

2)atomic number

3)selected oxidation states

4)number of valence electrons

5.On the Periodic Table, the number of protons in an

atom of an element is indicated by its

1)atomic number

2)oxidation number

3)number of neutrons

4)number of valence electrons

6.Which quantity represents the number of protons

in an atom?

1)mass number, only

2)atomic number, only

3)both mass number and atomic number

4)neither mass number nor atomic number

7.The notation for the nuclide gives

information about

1)equals the number of electrons

2)equals the number of neutrons

3)is less than the number of electrons

4)is greater than the number of electrons

8.In an atom of argon-40, the number of protons

1)12 u2)12 g3)18 u4)18 g

9.An atom that contains six protons, six neutrons,

and six electrons has a mass of approximately

1)the least abundant isotopes of the element

2)the naturally occurring isotopes of the

element

3)the artificially produced isotopes of the

element

4)the natural and artificial isotopes of the

element

10.The atomic mass of an element is the weighted

average of the atomic masses of

1)nickel2)silicon

3)aluminum4)phosphorus

11.An atom that has 13 protons and 15 neutrons is an

isotope of the element

1)2)

3)4)

12.Which two notations represent isotopes of the

same element?

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a proton 2) an electron
a helium atom 4) a hydrogen atom

Which particle has the least mass?
1. The nucleus contains positively charged electrons.
2. The nucleus contains negatively charged protons. 3) The nucleus has a positive charge and is surrounded by negatively charged electrons.
3. The nucleus has a negative charge and is surrounded by positively charged electrons.
Which statement describes the structure of an atom?
1. A neutral nucleus is surrounded by one or more negatively charged electrons.
2. A neutral nucleus is surrounded by one or more positively charged electrons. 3) A positively charged nucleus is surrounded by one or more negatively charged electrons.
3. A positively charged nucleus is surrounded by one or more positively charged electrons.
Which statement describes the distribution of charge in an atom? 1) An atom is mostly empty space with a dense, positively charged nucleus.
1. An atom is composed of at least three types of subatomic particles.
2. An electron has a positive charge and is located inside the nucleus.
3. An electron has properties of both waves and particles.
Which conclusion was a direct result of the gold foil experiment?
1. atomic mass 2) atomic number
2. selected oxidation states
3. number of valence electrons
On the Periodic Table, the number of protons in an atom of an element is indicated by its 1) atomic number 2) oxidation number 3) number of neutrons 4) number of valence electrons
Which quantity represents the number of protons in an atom?

mass number, only
atomic number, only 3) both mass number and atomic number
neither mass number nor atomic number

The notation for the nuclide gives information about 1) equals the number of electrons

equals the number of neutrons
is less than the number of electrons
is greater than the number of electrons

In an atom of argon-40, the number of protons 1) 12 u 2) 12 g 3) 18 u 4) 18 g
An atom that contains six protons, six neutrons, and six electrons has a mass of approximately

the least abundant isotopes of the element 2) the naturally occurring isotopes of the element
the artificially produced isotopes of the element
the natural and artificial isotopes of the element

The atomic mass of an element is the weighted average of the atomic masses of

nickel 2) silicon 3) aluminum 4) phosphorus

An atom that has 13 protons and 15 neutrons is an isotope of the element 1) 2)

Which two notations represent isotopes of the same element?

total mass of all the protons and neutrons in an atom of Ti
total mass of all the protons, neutrons, and electrons in an atom of Ti
weighted average mass of the most abundant isotope of Ti 4) weighted average mass of all the naturally occurring isotopes of Ti

The atomic mass of titanium is 47.88 atomic mass units. This atomic mass represents the 1) an electron 2) a neutron
1. a nucleus 4) a proton
An orbital is defined as a region of the most probable location of
1. 2-7 2) 2-8 3) 2-7-1 4) 2-8-
Which electron configuration represents the electrons of an atom of neon in an excited state?
1. first shell to the third shell
2. second shell to the fourth shell
3. third shell to the fourth shell 4) fourth shell to the second shell
Which electron transition in an excited atom results in a release of energy?

circular path for electrons
circular path for neutrons 3) most probable location of electrons
most probable location of neutrons

According to the wave-mechanical model, an orbital is defined as the 1) 21 2) 24 3) 45 4) 66
What is the number of electrons in an atom of scandium?

Additional Atomic Review, Lecture notes of Chemistry

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Additional Atomic Review