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Chapter 2 The Atom Flashcards | StudBud
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Chapter 2 The Atom
Chapter 2 The Atom
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#Chemistryatoms
Flashcards
38 cards
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Questions
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Answers
1
How many protons are in the following isotope?
6
8
14
20
2
How many electrons are in the following isotope?
7
2
1
3
3
What does the number 54 in Chromium-54 represent?
mass number
atomic number
twice the number of protons
sum of the protons and electrons
4
What is the mass number in the following isotope?
14
6
20
8
5
What is the electron configuration on boron(B)?
1s2 2s2 2p6 4s1
1s2 2s2 2p6
1s2 2s2 2p1
1s2 2s2 2p6 3s2
6
What is the mass of this particle?
9
7
3
4
7
All atoms are
are neutral.
negatively charged.
positively charged.
8
Which movement of electrons in the orbitals would transmit energy & release light?
3p to 4p
3p to 3s
1s to 2s
2s to 2p
9
What element is this particle?
fluorine
hydrogen
nitrogen
lithium
10
A measurement of the kinetic energy of particles is its
weight.
temperature.
length
mass.
11
Which color of visible light has the highest frequency?
green
violet
blue
red
12
How many p+, e- and n
o
does an atom with atomic # 28 and a mass # of 58 contain?
28 protons, 58 neutrons and 28 electrons
58 protons, 30 neutrons and 28 electrons
28 protons, 28 neutrons and 30 electrons
28 protons, 30 neutrons and 28 electrons
13
Which element contains 22 protons in the nucleus?
Sodium
Scandium
Titanium
Ruthenium
14
Most of the volume of an atom is occupied by the
nuclides.
nucleus.
electrons.
protons.
15
How many suborbital(s) can each of the differently shaped orbitals hold?
s:1, p:3, d:5, f:7
s:1, p:2, d:3, f:4
s:1, p:3, d:10, f:14
s:2, p:6, d:10, f:14
16
Which two particles are part of an atom's nucleus?
protons and electrons
protons and neutrons
neutrons and electrons
17
Which scientist performed the Gold Foil experiment?
Rutherford
Dalton
Thomson
Bohr
18
If electrons have the lowest energies possible, the electrons are in their
excited states.
ground states.
radiation-emitting states.
inert states.
19
Electricity consists of a stream of
electrons.
protons.
neutrons.
gamma rays.
20
What is the electron configuration of the ion Scandium (Sc #21) with a charge of +2?
1s2 2s2 2p6 3s2 3p6 4s1
1s2 2s2 2p6 3s2 3p6 4s2 3d3
1s2 2s2 2p6 3s2 3p6 4s2
1s2 2s2 2p6 3s2 3p6 4s2 3d1
21
For an electron to change from the ground to the excited state,
electrons move from a higher to a lower energy level.
energy must be released.
energy must be absorbed.
22
A subatomic particle that has about the same mass as a proton, but had no charge is called the
isotope.
electron.
nuclide.
neutron.
23
In Rutherford's experiment, most of the alpha particles
combined with the foil.
passed through the foil.
bounced back.
were absorbed by the foil.
24
When an electron moves from a higher energy level to a lower energy level, it will release
energy.
light.
protons
heat.
25
What element has the following orbital diagram?
Carbon
Oxygen
Boron
Beryllium
26
The probability of finding electrons in certain regions of an atom is described by
photons.
orbits.
quanta.
orbitals.
27
What is the charge of this ion?
-1
3
1
0
28
How is the principal quantum number of an electron symbolized?
n
s
p
d
29
Two atoms are isotopes if they contain
the same number of protons but different numbers of neutrons
different numbers of electrons.
different number of protons and different number of neutrons
total number of protons and neutrons.
30
Dalton's Atomic Theory included which idea?
All atoms of all elements are the same size.
Atoms of different elements always combine in 1:1 ratios.
Atoms of the same element are always identical.
Individual atoms can be seen with a microscope.
31
How many neutrons are in the following isotope?
6
14
20
8
32
An ion always contains an
equal number of protons and electrons.
unequal number of protons and neutrons.
unequal number of protons and electrons.
equal number of protons and neutrons.
33
Rutherford called the core of the atoms the
neutron.
nucleus.
electron.
proton.
34
The Gold Foil Experiment led to the discovery of the
neutron.
nucleus.
electron.
cathode ray.
35
Which of the following has the longest wavelength?
gamma rays
infrared
x-rays
UV rays
36
An atom is defined as the smallest part of an element that
retains the chemical identity of that element.
is affected in a cathode ray tube.
can carry an electrical charge.
contains at least 1 proton, neutron and electron.
37
How many unshared e- are in the following orbital diagram?
0
1
5
4
38
Which of the following is NOT a form of electromagnetic radiation?
sound waves
x-rays
visible light
gamma rays
