Answer:
1.26
Explanation:
change 45 grams to kilograms which is 0.045 then just multiply it by 28 m/s
0.045x28=1.260
its two valence electrons
Calcium is a group 2 element with two valence electrons. Therefore, it is very reactive and gives up electrons in chemical reactions.
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B.coffee
8%
Mixture of element and compounds