Yes there are. Perhaps the most famous and obvious is squaric acid.
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Answer:
i do not know i think the answer is 23
Explanation:
Answer:
The answer is 33 .
Explanation:
The mass number of an atom is the atomic mass which consists of proton and neutron. This atom has 16 protons and 17 neutrons so it has a mass of 33 :
proton number + neutron number = nucleon number / atomic mass
16 + 17 = 33
