Physical science atomic structure
Quiz by Katrina Oldham
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- Q1
The nucleus of an atom i s composed of
neutrons
protons
loosely connected protons & electrons
protons and neutrons
20s - Q2
I sotopes are atoms of the same element that have different
number of neutrons
masses
number of protons
number of electrons
20s - Q3
For an electron in an atom to change from the ground state to an excited state
energy must be released
radiation must be emitted
the electron must make a transition from a higher to a lower energy level
energy must be absorbed
20s - Q4
Every atom of a given element does NOT have the same number of
neutrons
electrons
protons
atoms
20s - Q5
All oxygen atoms have 8 protons. How many neutrons does an oxygen-18 have?
26
8
10
18
15s - Q6
__________ is a visual model of the most likely locations for the electrons in an atom.
nucleus
Bohr's model
atomic radius
electron cloud model
20s - Q7
J.J. Thomson's experiments provided evidence that an atom
contains negatively charged particles
has a positive charge
is the smallest particle of matter
has a negative charge
20s - Q8
Rutherford's gold foil experiment provided evidence for which of the following statements?
alpha particles have a positive charge
There is a dense, positively charged mass in the center of an atom
gold is not as dense as previously thought
negative and positive charges are spread evenly throughout an atom
20s - Q9
Which statement accurately represents the arrangement of electrons in Bohr's atomic model?
electrons vibrate i n fixed locations around the nucleus
electrons travel around the nucleus in fixed energy levels with energies that vary from level to level.
Electrons travel around the nucleus i n fixed energy levels with equal mounts of energy
electrons travel randomly in the relatively large space outside the nucleus
20s - Q10
How was Bohr's atomic model similar to Rutherford's model?
it described electron position in terms of the electron cloud model
it described a nucleus surrounded by a large volume of space
It described how electrons gain or lose energy
it assigned energy levels to electrons
20s - Q11
Which statement about subatomic particles is true?
an electron has far less mass than either a proton or neutron
Protons, neutrons, and electrons all have about the same mass
neutrons have no charge and no mass
unlike protons or neutrons, electrons have no mass
20s - Q12
Which of the following is unique for any given element?
the number of protons
the mass of a neutron
the number of neutrons
the charge on the electrons
20s - Q13
Suppose an atom has a mass number of 35. Which statement is true?
the atom i s not an isotope
the atomic number i s less than 17
the atom has an odd number of neutrons
the number of protons in the nucleus does not equal the number of neutrons
20s - Q14
Which statement i s true about oxygen-17 & Oxygen-18?
They are isotopes of oxygen
their atoms have an identical mass
they have the same mass number
they do not have the same umber of protons
20s - Q15
Which statement about electrons and atomic orbitals i s NOT true?
an orbital can contain a maximum of two electrons
An electron cloud represents all the orbitals in an atom
An electron has the same amount of energy in all orbitals
An atom's lowest energy level has only one orbital
20s