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Engchem
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Chemistry
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University
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Practice Problem
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Jon Sunga
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35 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Which of the following statements is true for a 14C?
it has 6 protons and 8 neutrons
it has 6 protons and 6 neutrons
it has 12 protons and 12 neutrons
it has 12 protons and 8 neutrons
none of these
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Which of the following statements is true for a 37Cl– anion?
it has 17 protons, 18 electrons, and 20 neutrons
it has 17 protons, 16 electrons, and 17 neutrons
it has 37 protons, 37 electrons, and 20 neutrons
it has 20 protons, 8 electrons, and 11 neutrons
none of these
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Which of the following statements is true for a 25Mg+2 cation?
it has 12 protons, 14 electrons, and 12 neutrons
it has 12 protons, 10 electrons, and 12 neutrons
it has 12 protons, 10 electrons, and 13 neutrons
it has 24 protons, 12 electrons, and 24 neutrons
none of these
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Beta emission is associated with __________
conversion of a neutron to a proton.
conversion of a proton to a neutron.
increase in mass number.
decrease in mass number by 4 and atomic number by 2.
emission of γ rays.
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Electron-capture is associated with __________
conversion of a neutron to a proton.
conversion of a proton to a neutron.
increase in mass number.
decrease in mass number by 4 and atomic number by 2.
emission of γ rays.
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Alpha emission is associated with __________
conversion of a neutron to a proton.
conversion of a proton to a neutron.
increase in mass number.
decrease in mass number by 4 and atomic number by 2.
emission of γ rays.
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Positron emission is associated with __________
conversion of a neutron to a proton.
conversion of a proton to a neutron.
increase in mass number.
decrease in mass number.
emission of γ rays.
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