Which of the following statements is true?
a. calcium and potassium are good for your body.<...
Chemistry, 06.12.2019 01:31 jeniferfayzieva2018
Which of the following statements is true?
a. calcium and potassium are good for your body.
b. most of the atmosphere is made of oxygen and helium.
c. the center of an atom is made of protons and electrons.
d. all of the above.
Answers: 1
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