21.
How would you describe the nucleus?
A
tiny, negatively charged
B
dense, negatively charged
C
dense, positively charged
D
mostly empty space, positively charged
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25 practice sets · Page 2 of 2
How would you describe the nucleus?
tiny, negatively charged
dense, negatively charged
dense, positively charged
mostly empty space, positively charged
The number at the top is the
atomic mass.
chemical symbol.
atomic number.
element name.
The properties of elements in a horizontal row of the periodic table follow
no pattern.
an unpredictable pattern.
a nonrepeating pattern.
a periodic pattern.
If an isotope of uranium, uranium-235, has 92 protons, how many protons does the isotope uranium-238 have?
143
146
92
95
A carbon atom with 6 protons, 6 electrons, and 6 neutrons would have a mass number of
12
15
6
18