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WorksheetsAtomic Concepts Review
Total questions: 21
Worksheet time: 42mins
The results of the gold foil experiment led to the conclusion that an atom is
mostly empty space and has a small, negatively charged nucleus
mostly empty space and has a small, positively charged nucleus
a hard sphere and has a large, negatively charged nucleus
a hard sphere and has a large, positively charged nucleus
Which notations represent atoms that are isotopes of each other?
C-14 and N-14
O-16 and O-18
I-131 and I-131
Rn-222 and Ra-222
An excited potassium atom releases a specific amount of energy when one of its electrons moves from
the first shell to the fourth shell
the second shell to the fourth shell
the fourth shell to the fifth shell
the fourth shell to the second shell
The characteristic bright-line spectrum of an atom is produced when
nuclei undergo fission
nuclei undergo fusion
electrons move from higher to lower energy levels
electrons move from lower to higher energy levels
Identify the elements in the unknown mixture using their unique bright-line spectra.
Lithium and cadmium are in the mixture. Strontium is not in the mixture.
Lithium and strontium are in the mixture. Cadmium is not in the mixture
Cadmium and strontium are in the mixture. Lithium is not in the mixture
All of the shown elements are present in the mixture.
Which electron configuration represents an atom of Aluminum in the ground state?
2-8
2-8-3
2-8-6
2-11
Which statement describes the location of two types of subatomic particles in an atom of helium?
Protons and neutrons are located in the nucleus
Protons and neutrons are located outside the nucleus
Protons and electrons are located in the nucleus
Protons and electrons are located outside the nucleus
Which statement describes the structure of an atom?
The nucleus contains positively charged electrons
The nucleus contains negatively charged protons
The nucleus has a positive charge and is surrounded by negatively charged electrons
The nucleus has a negative charge and is surrounded by positively charged electrons
An atom of Argon-42 contains
24 electrons, 24 protons, and 42 neutrons
24 electrons, 24 protons, and 24 neutrons
18 electrons, 18 protons, and 42 neutrons
18 electrons, 18 protons, and 24 neutrons
What is the approximate mass of an atom that has 10 protons, 10 electrons, and 9 neutrons?
10 u
19 u
20 u
29 u
Which phrase describes the different isotopes of an element?
same number of electrons and a different number of protons
same number of protons and a different number of electrons
same number of protons and a different number of neutrons
same number of neutrons and a different number of protons
All the isotopes of a given atom have
the same mass number and the same atomic number
the same mass number but different atomic numbers
different mass numbers but the same atomic number
different mass numbers and different atomic numbers
Bromine has two naturally occurring stable isotopes. Given the data in the table, which mathematical model can be used to calculate the atomic mass of bromine?
(78.92)(50.69)+(80.92)(49.31)
(78.92)(49.31)+(80.92)(50.69)
100(78.92)(50.69)+(80.92)(49.31)
100(78.92)(49.31)+(80.92)(50.69)
The atomic mass of titanium is 47.87. This atomic mass represents the
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
weighted average mass of all the naturally occurring isotopes of Ti
What is the total number of valence electrons in an atom with an electron configuration of 2-8-7?
2
7
8
15
What is the total number of completely filled energy levels in an atom of argon in the ground state?
1
2
3
4
Compared to the energy of an electron in the second shell of an atom of sulfur, the energy of an electron in the
first shell is lower
first shell is the same
third shell is lower
third shell is the same
Compared to an electron in the first shell of an atom, an electron in the third shell has
less mass
less energy
more mass
more energy
A photon with a wavelength of 5.6 x 10-7 meter would be observed as
Orange light
Yellow light
Green light
Blue/Violet light
Electromagnetic radiation that contains photons with a frequency of 1.5 x 1018 Hertz would be classified as
Visible light
Ultraviolet
X-ray
Gamma
Compared to visible light, microwaves generally have a
lower frequency, longer wavelength, and more energy
lower frequency, longer wavelength, and less energy
higher frequency, shorter wavelength, and more energy
higher frequency, shorter wavelength, and less energy
