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d. only V<br />
e. I and IV<br />
____ 115. Which of the following has a negative charge?<br />
a. nucleus<br />
b. neutron<br />
c. proton<br />
d. electron<br />
e. alpha particle<br />
____ 116. Ernest Rutherford's model of the atom did not specifically include the __________.<br />
a. neutron<br />
b. nucleus<br />
c. proton<br />
d. electron<br />
e. electron or the proton<br />
____ 117. The number of electrons in a neutral atom of an element is always equal to the __________ of the element.<br />
a. mass number<br />
b. atomic number<br />
c. atomic mass unit<br />
d. isotope number<br />
e. Avogadro's number<br />
____ 118. The atomic number of an element gives the number of __________ and __________ in the atom while the<br />
mass number gives the total number of __________ and __________.<br />
a. neutrons, protons; neutrons, electrons<br />
b. neutrons, electrons; protons, electrons<br />
c. neutrons, electrons; neutrons, protons<br />
d. protons, electrons; neutrons, electrons<br />
e. protons, electrons; neutrons, protons<br />
____ 119. The difference between the mass number of an atom and the atomic number of the atom is always equal to<br />
__________.<br />
a. 6.02 10 23<br />
b. the atomic number of the element<br />
c. the atomic mass unit<br />
d. the number of protons in the nucleus<br />
e. the number of neutrons in the nucleus<br />
____ 120. Give the number of protons, neutrons, and electrons in an atom of the 41 K isotope.<br />
a. 19 p, 22 n, 22 e<br />
b. 41 p, 19 n, 41 e<br />
c. 19 p, 22 n, 19 e<br />
d. 19 p, 16 n, 19 e<br />
e. 15 p, 26 n, 15 e<br />
____ 121. What is the symbol for a species composed of 38 protons, 52 neutrons, and 36 electrons?<br />
a.<br />
90 2+<br />
Kr<br />
b.<br />
90 2+<br />
Sr<br />
c.<br />
90<br />
Sr<br />
d.<br />
52<br />
Kr<br />
e.<br />
38 2+<br />
Th
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