Chemistry
Grade-9
Easy
Question
All elements in the same group have the same number of ___.
- Protons
- Neutrons
- Atomic mass units
- Valence electrons
Hint:
Number of valence electrons are same.
The correct answer is: Valence electrons
Down the group atomic number increases, hence atomic mass also increases, number protons increases.
Down the group number of valence electrons are same.
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