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Calcium has an atomic weight of 40.

Other info about Calcium:

Symbol: Ca

Name: Calcium

Atomic Number: 20

Atomic Weight: 40.08

Number of Neutrons: 20 (atomic weight - atomic number)

Number of Protons: 20

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โˆ™ 2012-05-22 22:04:16
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Q: What is the element that has atomic weight 40?
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