Answer:
C. Ca.
Explanation:
The atom loses or gains electrons forming anion or cation to reach stability (fill the outermost shell of the electron levels).
When atom gains electrons forms anions with negative charge.
While, when atom loses electrons forms cations with positive charge.
A. O:
O atom has 8 electrons in its nucleus and gains 2 electrons to reach stability (10 electrons, configuration of Ne).
<em>So, it forms O²⁻.</em>
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B. AI:
Al atom has 13 electrons in its nucleus and loses 3 electrons to reach stability (10 electrons, configuration of Ne).
<em>So, it forms Al³⁺.</em>
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C. Ca:
Ca atom has 12 electrons in its nucleus and loses 2 electrons to reach stability (10 electrons, configuration of Ne).
<em>So, it forms Ca²⁺.</em>
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D. Na:
Na atom has 11 electrons in its nucleus and loses 1 electron to reach stability (10 electrons, configuration of Ne).
<em>So, it forms Na⁺.</em>
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Answer:
Vitamin D
Explanation:
Without Vitamin D animals (humans included) will start to degrade and organs will shut down
Answer:
The nucleus of an atom consists of Protons and Neutrons.-A.
The baseball is thrown twice as fast as the softball in the same direction.
