Class :-9th
Subject :- Chemistry
Chapter :- Atoms and Molecules
Question :- What is the difference between (i) Calcium ion and Oxide ion (ii) Oxygen molecule and Oxygen atom (iii) Chlorine atom and Chloride ions?
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answer 1
the calcium ion is an Allaline earth metal and wants to give up the 2s orbital election and become at 2 cation.
oxygen has six valence electrons and is looking to gain electron to complete the acted (8) electron to count in the valency shell making it a-2 anion.
answer 2
an oxygen atom , 0, is a single atom with 8 proton , 8 electrons , and more than likely 8 nurons (although that can change from isotope ) ..
instead, oxygen is almost always found as O2 , the oxygen molecules. this is what we breathe, this is how oxygen normally exists, you can buy a tank of O2 molecule.
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answer 3 in a picture
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