Answer:
C Atomic number
Explanation:
The question is typo it should be 19 is the____ of pottasium. The atomic number is the number on top
305 x 4 = 1220.
1/4 of 304 = 76.
1220 + 76 = 1296.
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Answer:
11
Explanation:
The atomic number = number of protons. The mass number (23) = sum of number of neutrons and protons. Since you know the mass number is 23 and it has 12 neutrons, 23-12 gives you 11 protons, so its atomic number is 11.
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Pb2+(aq) + CO3 2-(aq) ==> PbCO3(s)
