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Atoms and Electrons Exam Review Flashcards | StudBud
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Atoms and Electrons Exam Review
Atoms and Electrons Exam Review
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1
The electron configuration that ends 4d
9
represents which element?
Silver
Nickel
Copper
Gold
2
A unit of light energy is called a
excited state
proton
photon
orbital
3
An elements atomic number is equal to its number of
protons and neutrons
neutrons and electrons
neutrons
protons
4
How many protons does an atom of neon have?
20
10
15
5
5
Which of these orbital designations are invalid?
2s
4s
3f
5d
6
Which statement is NOT a part of Dalton's Atomic Theory?
Atoms are made of electrons
Atoms of different elements form compounds
Atoms cannot be divided
Atoms of an element are alike
7
An electron jumps to a new energy level when
the atom gains or loses energy
the atom becomes charged
the electrons location is discovered
the atom becomes unstable
8
Which sublevel includes elements in groups 13-18?
s
f
p
d
9
The average atomic mass of an element is
not related to isotopes
closer to the value of the common isotope
closer to the value of a rare isotope
10
What is found inside the nucleus?
electrons and neutrons
protons and neutrons
only protons
only neutrons
11
Which of the following is a type of orbital
a
b
c
d
12
UNLIKE the modern model of the atom, Bohr's model states that
atoms cannot be divided into smaller parts
electrons behave like waves
electrons move in set paths around the nucleus of an atom
electrons contain orbitals
13
The most stable arrangement of electrons in an atom is called
Energy Levels
Electron Configuration
Orbital Notation
Noble Gas Notation
14
No more than two electrons can occupy an orbital, and they must have oppisite spins.
Hund's Rule
Aufbau Principle
Bohr's Law
Pauli Exclusion Principle
15
What is the correct isotope name for an atom that has 17 protons, 20 neutrons and 17 electrons?
Ca-37
Cl-37
Ca-20
Cl-20
16
What is the name of Hg?
Antimony
Mercury
Helium
Hydrogen
17
Distinct lines that correspond to the frequencies of light emitted by electrons in atoms
Atomic Signature
Emission Spectra
Energy Levels
Photons
18
Electrons will fill the lowest energy orbital first
Bohr's Law
Hund's Rule
Aufbau Principle
Pauli Exclusion Principle
19
What is the symbol for Phosphorus
K
P
Ph
20
Two different isotopes of an element have different numbers of
neutrons
electrons
protons
atomic numbers
21
Which of the following statements is NOT true?
protons have a positive charge
Neutrons have a negative charge
the nucleus has a positive charge
electrons have a negative charge
22
Atoms that have gained or lost electrons are called
isotopes
positive
negative
ions
23
How many orbitals are found in the d sublevel
14
10
2
5
24
Which sublevels has the highest energy?
4s
3p
3d
2s
25
How many sublevels does energy level 3 have?
4
3
1
2
26
Atoms have no electric charge because they
have an equal number of charged and uncharged particles
have an equal number of protons and neutrons
have an equal number of protons and electrons
have neutrons in their nucleus
27
The number of energy levels filled in an atom is determined by the number of
protons
electrons
photons
neutrons
28
Thomson is responsible for discovering that an atom contains
electrons
a nucleus
molecules
protons
29
A region in space in which there is a high probability of finding an electron is called a/an
cloud
sublevel
orbital
energy level
30
Where are electrons likely to be found in an atom?
in orbitals
in fixed energy levels
in the nucleus
in the ground state
31
What happens when an atom absorbs a quantum of energy?
it falls to a ground state
it remains still
it emits light
it jumps to a higher energy level
32
How many electrons are in the highest occupied energy level of oxygen?
6
4
8
2
33
How many neutrons does an atom of silver have?
61
108
47
59
34
How many electrons are in the highest occupied energy level of barium?
1
4
3
2
35
The modern modern of the atom states that electrons
are always found in certain energy levels
position can be determined precisely
orbit around the nucleus like planets around the sun
are most likely found in orbitals
36
Atoms gain and lose electrons to
become larger
become smaller
become neutral
become stable
37
Orbitals of equal energy are each filled by one electron before doubling up. This is called
Pauli Exclusion Principle
Hund's Rule
Bohrs Law
Aufbau Principle
38
Whose model determined that an atom's positive charge is concentrated in an atom's center?
Rutherford's
Thomson's
Dalton's
Democritus's
39
Atoms emit light (photons) when the electrons
remain in the ground state
jump to the excited state
orbit around the nucleus
fall back to the ground state
40
1s
2
2s
2
2p
6
3s
1
is the electron configuration for
Lithium
Magnesium
Neon
Sodium
41
How many electrons are found in the f sublevel?
28
10
7
14
