Answer:
I would either say prediction or a hypotheses.
Explanation:
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The answer is B. Light microscope
Protons and neutrons. But since the protons outweigh the neutrons. so your answer is d
Calcium is a chemical element with symbol Ca and atomic number 20. Calcium is a soft gray Group 2 alkaline earth metal, fifth-most-abundant element by mass in the Earth's crust. The ion Ca2+ is also the fifth-most-abundant dissolved ion in seawater by both molarity and mass, after sodium, chloride, magnesium, and sulfate.[5] Free calcium metal is too reactive to occur in nature. Calcium is produced in supernova nucleosynthesis.
It is a metabolic process that is one of the main parts of cellular respiration
