Q2. Fill in the blank with correct words.
A: Chemical B: Horizontal C: Shells D: Columns E: Group VII
1) The vertical are called groups and therows are
called periods.
2) Elements in the same groups have the same number of electrons in their
outer for example, all the elements in have 7
electrons on their outer shells.
3) Elements in the same group have similar and physical properties
Answers: 3
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Q2. Fill in the blank with correct words.
A: Chemical B: Horizontal C: Shells D: Columns E: Group...
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