Answer:
Nitrogen and Oxygen make up 99% of the Earths atmosphere. Then Argon makes up the rest of the atmosphere.
There are six protons and eight neutrons present in the carbon atom as shown.
<h3>What is the nucleus?</h3>
The nucleus of an atom consists of its protons and its neutrons. The protons are positively charged while the neutrons have no charge.
From the symbol of the element as shown in the question, we can see that there are six protons and eight neutrons present.
Learn more about nucleus of atoms:brainly.com/question/10658589
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The crust of the Earth is thickest beneath the continents.
'cause alphe-particle which was +ve charge, get repulsion from the atom, so he deducted that.......