Question

Explain the formation of following compounds:

CaO , Na2O, H2O​

Answer 1

Answer:

Here your answer hope it helps

Answer 2

Answer:

Calcium reacts with oxygen to form an ionic compound calcium oxide (CaO). The atomic number of calcium is 20 and that of oxygen is 8 . By losing two electrons ,the calcium atom forms a calcium ion( Ca2+ ) ,and by gaining two electrons ,the oxygen atom forms an oxide ion (O2-). ... Thus calcium oxide contains ionic bonds

For the formation of Na2O: It is an ionic compound and sodium has 11 atomic number and oxygen has 8 atomic number. ... Therefore two atom of sodium will combine with one atom of oxygen and each sodium will lose one electron to oxygen and therefore completing its octet.

For example, when hydrogen gas, H2(g), is burned in the presence of gaseous oxygen, O2(g), a new substance, liquid water, H2O(l ), forms. The covalent bonds within the H2 molecules and O2 molecules break, and new covalent bonds form between oxygen atoms and hydrogen atoms