2. Atoms & Elements
Subatomic Particles
1:40 minutes
Problem 29b
Textbook Question
Textbook QuestionFill in the gaps in the following table, assuming each column represents a neutral atom.
Symbol 79Br
Protons 25 82
Neutrons 30 64
Electrons 48 86
Mass no. 222 207
Complete the second row of the table excluding the row with isotope symbol.
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