What is the atomic number of Calcium?
...What is the atomic number of Calcium?
17
18
19
20
Correct answer is D
No explanation has been provided for this answer.
What is the atomic number of Oganesson? ...
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The oxidation state of chlorine in potassium chlorate is? ...
Which of the following equations does not illustrate correctly one of the reactions of chlorine? ...
An example of an acidic oxide is ...
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Which of the following ions has the electron configuration 2,8,8? ...