Answer is B. gas formation
Answer: With atomic number 20, calcium atoms have 20 positive protons, and the ion has only 18 electrons, which means the net charge is +2. Calcium ions are essential for muscle contractions, nerve impulses, and bone maintenance.
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The answer is D. Effective collisions lead to chemical reactions!
I don’t know dawg but I’m just answering this so I can complete the steps good luck tho