2. Atoms & Elements
Subatomic Particles
1:40 minutes
Problem 30a
Textbook Question
Textbook QuestionFill in the gaps in the following table, assuming each column represents a neutral atom.
Symbol 112Cd
Protons 32 92
Neutrons 58 49
Electrons 38 36
Mass no. 81 235
Complete the first row of the table.
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