Magnesium + oxygen makes Magnesium Oxide.
The big numbers are for balancing the equation.
A potassium atom has a higher proton number meaning that it has more protons and electrons. Due to the Octet Rule, the more electrons an atom has the more shells it has and so will be bigger in size.
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Answer: Potassium is 39.10 g/mol
Explanation: The numbers below the element are the molar mass.
Answer:
5 atoms
Explanation:
1 calcium, 2 oxygen and 2 hydrogen makes for a total of 5 atoms in 1 molecule.