Answer:
Mass of proton is
<h2>
1.6726219 × 10-27 Kg</h2>
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Oxygen can combine with a metal to produce a compound
I think it’s number 5 and number 9 hopes this helps.
Pressure varies in the atmosphere because air molecules are being pulled down towards the center of the earth-hope this helps!
<span>D.) Oxygen would acquire a stable arrangement of electrons by bonding with two atoms of "Magnesium"
[ As Mg has 2 extra electrons & their size are quite similar ]
Hope this helps!</span>
