Answer:When you look at the periodic table, each row is called a period (Get it? Like PERIODic table.). All of the elements in a period have the same number of atomic orbitals. For example, every element in the top row (the first period) has one orbital for its electrons.
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The answer is letter A definitively .
Answer:
Mass states that mass is neither created nor destroyed in a chemical reaction or a physical transformation
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