PORTAGE CHEMISTRY 219 PRACTICE
SOLUTION STUDY SHEET QUESTIONS AND
DETAILED ANSWERS
●● atomic number =
Answer: # of protons
●● mass number =
Answer: # of protons + neutrons
●● the number of protons in a neutral atom will equal the
Answer: # of electrons
●● how to find the correct number of neutrons
Answer: mass number - atomic number
●● Forms of the same elements that differ in amount of neutrons
Answer: isotopes
●● What particle, if lost from the nucleus, would NOT cause a change in
the atomic number?
Answer: a neutron because it has no charge
,●● When alpha particles were shot at a metal foil target, most passed
through without deflections, while others deflected at large angles. What
did this suggest to Rutherford?
Answer: that the atoms of the metal were mostly empty space, while the
nucleus consisted of most of the mass which included highly condensed
positive particles (which caused the deflection).
●● An atom has a valence shell configuration of 1s1. To which group of
elements on the periodic table does it belong?
Answer: IA
alkali metals
●● electromagnetic spectrum
Answer:
●● The greater the wavelength of a photon..?
Answer: the lower its frequency
●● The greater the frequency of a photon...?
Answer: the shorter its wavelength
●● Light energy formula
,Answer:
●● What does C in the light energy formula represent?
Answer:
●● Give the ground-state electron configuration of an atom in the
second period
Answer: 1s2 2s1
●● Electrons configuration rule that states electrons do not pair until
they have to. (put one electrons in each electron domain then pair up)
Answer: Hund's rule
●● An experimental phenomena associated with atoms having unpaired
electrons - which states such substances are attracted to magnetic fields
Answer: Paramagnetism
●● Which drop in energy level results in the greatest emission of
energy?
Answer: n=2 to n=1
●● quantum numbers
Answer:
, ●● What do the 4 quantum numbers stand for?
Answer: n = energy level
l = (n-1)
ml -l to l
mn 1/2 or -1/2 (spin)
●● List the quantum numbers for the s, p, d, and f orbitals
Answer: s 1,0,0
p 2, 1, -1-0-1
d 3, 2, -2--1-0-1-2
f 4, 3 -3--2--1-0-1-2-3
●● Py orbital
Answer:
●● Which element is represented by X
Answer: Chromium
●● What two subatomic particles have the most mass, but occupy very
little of the volume of an atom
Answer: protons and neutrons
SOLUTION STUDY SHEET QUESTIONS AND
DETAILED ANSWERS
●● atomic number =
Answer: # of protons
●● mass number =
Answer: # of protons + neutrons
●● the number of protons in a neutral atom will equal the
Answer: # of electrons
●● how to find the correct number of neutrons
Answer: mass number - atomic number
●● Forms of the same elements that differ in amount of neutrons
Answer: isotopes
●● What particle, if lost from the nucleus, would NOT cause a change in
the atomic number?
Answer: a neutron because it has no charge
,●● When alpha particles were shot at a metal foil target, most passed
through without deflections, while others deflected at large angles. What
did this suggest to Rutherford?
Answer: that the atoms of the metal were mostly empty space, while the
nucleus consisted of most of the mass which included highly condensed
positive particles (which caused the deflection).
●● An atom has a valence shell configuration of 1s1. To which group of
elements on the periodic table does it belong?
Answer: IA
alkali metals
●● electromagnetic spectrum
Answer:
●● The greater the wavelength of a photon..?
Answer: the lower its frequency
●● The greater the frequency of a photon...?
Answer: the shorter its wavelength
●● Light energy formula
,Answer:
●● What does C in the light energy formula represent?
Answer:
●● Give the ground-state electron configuration of an atom in the
second period
Answer: 1s2 2s1
●● Electrons configuration rule that states electrons do not pair until
they have to. (put one electrons in each electron domain then pair up)
Answer: Hund's rule
●● An experimental phenomena associated with atoms having unpaired
electrons - which states such substances are attracted to magnetic fields
Answer: Paramagnetism
●● Which drop in energy level results in the greatest emission of
energy?
Answer: n=2 to n=1
●● quantum numbers
Answer:
, ●● What do the 4 quantum numbers stand for?
Answer: n = energy level
l = (n-1)
ml -l to l
mn 1/2 or -1/2 (spin)
●● List the quantum numbers for the s, p, d, and f orbitals
Answer: s 1,0,0
p 2, 1, -1-0-1
d 3, 2, -2--1-0-1-2
f 4, 3 -3--2--1-0-1-2-3
●● Py orbital
Answer:
●● Which element is represented by X
Answer: Chromium
●● What two subatomic particles have the most mass, but occupy very
little of the volume of an atom
Answer: protons and neutrons
