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WorksheetsUnit 1 Review
Total questions: 8
Worksheet time: 8mins
Which isotope has a larger percent abundance, Cl-35 or Cl-37, given that the average atomic mass of Chlorine is 35.45 amu?
Cl-35
Cl-37
both have the same percentage
cannot be determined from this data
An element has two isotopes. One isotope has a relative abundance of 75.0% and mass 25.0 amu. The second isotope has a relative abundance of 25.0% and 28.0 amu. What is the average atomic mass of the element?
26.5 amu
25.8 amu
27.3 amu
258 amu
Element C has both a different mass number and identity than elements A and B
TRUE
FALSE
Which two atoms are isotopes of one another?
Atoms 1 & 2
Atoms 2 & 3
Atoms 1 & 3
Atoms 1 & 4
What did Rutherford discover about atoms?
An atom is always negatively charged.
An atom is mostly empty space, but has a dense positively charged center(nucleus).
An atom is always positively charged.
All particles will pass straight through gold foil with no change in path.
Why is Model B incorrect and Model A correct?
Because electrons are suppose to absorb energy, release a photon of light, and jump to a higher energy level before falling back down.
Because electrons are suppose to absorb energy and jump to a higher energy level. As they fall back down that energy is released as a photon of light.
Which element has the following electron configuration?
Selenium (Se)
Arsenic (As)
Vanadium (V)
Phosphorus (P)
What electron configuration matches the ion: Al +3
1s22s22p63s23p4
1s22s22p6
1s22s22p63s23p1
1s22s22p63s2
