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Answer the following questions:
Answer variants:
When elements are arranged in increasing order of their atomic mass, every eighth element resembles the first.
Maximum number of valence electrons in \(1\)st period is \(2\)
When elements are arranged in decreasing order of their atomic nuber every eighth element resembles the first.
Atomic number of X = \(15\), Atomic number of Y = \(22\)
1. Predict the maximum number of valence electrons possible for atoms in the first period of the periodic table.
2. Define Newlands law of octaves.
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