<u>Answer:</u>
Sodium atom is larger than Magnesium atom.
<u>Explanation:</u>
Looking at the electronic configurations of Sodium and Magnesium:
,
we can see that they both have their valence electrons in the 3rd shell.
But because Magnesium has a higher nuclear charge of +12 because of its 12 protons than that of Sodium's +11, the nucleus of Magnesium attracts its outer electrons more strongly than Sodium does. This makes the Magnesium atom smaller.
Answer:
2H3PO4 + 3Ca(OH)2 = Ca3(PO4)2 + 6H2O
3CaO + P2O5 = Ca3(PO4)2
Mass = PROTONS + neutrons. So, 19 +20 = 39.
(Don't confuse yourself between electrons and protons when they are equal because it could be an ion)
The answer is A if the temperature increases, then it’s volume will also increase
The answer it the function