The correct answer is option 1. Be, Mg, and Ca is the correct order arranged in increasing atomic radius. This is predicted based on the periodic table. The atomic sizes increases as one moves downwards in the periodic table.
Answer:
10 x 5 = 50
Explanation:
50 is the mass of her chemical.
Answer:

Explanation:
The number of valence electrons tells us the group number of the neutral atom.
The atom has 4 valence electrons.
The atom is in group 4.
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<span>It makes a longitudinal wave because it stretches and compresses while as it slithers foward.
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