Answer :
Explanation:
Atomic number means the sum of total number of protons present in an element.
Atomic number of fluorine is 9 whereas atomic number of sodium is 11.
Therefore, atomic number of F + atomic number of Na
= 9 + 11
= 20
It is known that calcium is the element that has atomic number 20. Its electronic distribution is 2, 8, 8, 2.
Thus, we can conclude that the atomic number of F plus the atomic number of Na equals the atomic number of element calcium.
Answer:
The correct answer is calcium.
Explanation:
In the periodic table, there are several elements and each element has a specific atomic number. The atomic number of Flourine is 9 and the atomic number of sodium is 11.
[tex]F+ Na = X\\9+11= 20[/tex]
20 is the atomic number of calcium.
Therefore, the atomic number of F plus the atomic number of Na equals the atomic number of this calcium.
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