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Ch 4 Atomic Structure - Physical Science Flashcards | StudBud
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Ch 4 Atomic Structure - Physical Science
Ch 4 Atomic Structure - Physical Science
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Chapter 4 Atomic Structure Review
Flashcards
25 cards
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Questions
25
Answers
1
The glowing of a neon light is caused by electrons emitting energy as they
collide with the nucleus.
move from lower to higher energy levels.
move from higher to lower energy levels.
collide with other electrons.
2
Which of the following is unique for any given element?
the mass of a neutron
the number of neutrons
the charge on the electrons
the number of protons
3
Democritus thought that matter was made of tiny particles
that could not be divided.
that could be divided.
that were all round and smooth.
of earth, air, fire, and water.
4
What does the electron cloud model describe?
the precise location of electrons in atoms
the mass of the electrons in an atom
the number of electrons in atoms
the most likely location of electrons in atoms
5
Which sentence states what Rutherford concluded from the gold foil experiment?
An atoms negative charge is concentrated in it's nucleus.
At atom's positive charge is concentrated in it's nucleus.
The atom's positive charge is spread evenly about the atom.
Thomson's model of the atom was correct.
6
How was Bohr's atomic model similar to Rutherford's model?
It assigned energy levels to electrons.
It describes a nucleus surrounded by a large volume of space
It describes electron position by using electron cloud model
It described how electrons gain or lose energy.
7
What do scientists use to predict the locations of electrons in atoms?
algebra
ratios and proportions
geometry
probability
8
Which statement about particles is TRUE?
Protons, neutrons & electrons all have about the same mass.
Neutrons have no charge and no mass.
Unlike protons and neutrons, electrons have no mass.
An electron has far less mass than a proton or a neutron.
9
All hydrogen atoms have 1 proton. Which is the number of neutrons in an atom of hydrogen-3?
3
0
2
1
10
In Niels Bohr's model of the atom, electrons move
like beach balls on water waves.
like popcorn in a popcorn popper.
like planets orbiting the Sun.
like balls rolling down a hill.
11
J. J. Thomson's experiments provided evidence that an atom
has a negative charge.
is the smallest particle of matter.
has a positive charge.
contains negatively charged particles.
12
The Greek philosopher coined what word for a tiny piece of matter that cannot be divided?
molecule
electron
atom
element
13
The number of protons in one atom of an element is that element's
isotope.
balanced charge.
mass number.
atomic number.
14
Which quantity is always equal to the element's atomic number?
number of neutrons
number of electrons
number of nuclei
number of protons
15
Which is true when all of an atoms electrons are in orbitals with the lowest possible energies?
The electrons are in the most stable configuration.
The atom is in an excited state.
The atom is in its ground state.
The electrons are in an unstable configuration.
16
Which statement tell's how Bohr's model of the atom differed from Rutherford's model?
Bohr's model focused on the electrons.
Bohr's model focused on the neutrons.
Bohr's model focused on the nucleus.
Bohr's model focused on the protons.
17
What can you assume has happened if an electron moves to a higher energy level?
The atom has lost an electron.
The electron has lost energy.
The electron has gained energy.
The atom has become more stable.
18
If 2g of X combine with 4g of Y to form XY, how many grams of Y would combine with 14g of X ?
14 grams
21 grams
7 grams
28 grams
19
Which of the following is NOT part of John Dalton's atomic theory?
All atoms of the same element have the same mass.
Atoms contain subatomic particles.
All elements are composed of atoms.
A compound contains atoms of more than one element.
20
Which statement about subatomic particles is NOT true?
Protons and neutrons have the same charge.
Protons and neutrons have almost the same mass.
Unlike protons and electrons, neutrons have no charge.
Protons and electrons have opposite charges.
21
Which expression accurately compares the masses of neutrons and protons?
mass of 1 electron = mass of 1 proton
mass of 1 neutron = mass of 1 electron
mass of 1 neutron = mass of 1 proton
mass of 2000 neutron = mass of 1 proton
22
Who provided evidence for the existence of a nucleus in an atom?
Democritus
John Dalton
J. J. Thomson
Ernest Rutherford
23
To find the number of neutrons in an atom, you would subtract
mass number from atomic number.
isotope number from atomic number.
atomic number from mass number.
atomic number from electron number.
24
Which statement is true about oxygen-17 and oxygen-18?
They have the same mass number.
Their atoms have an identical mass.
They do not have the same number of protons.
They are isotopes of oxygen.
25
Which subatomic particle has a negative charge?
proton
electron
alpha particle
neutron
