The mineral that is the hardest known substance in nature is a diamond.
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This is Bohrs model for potassium
Answer:
Atomic number is the number of protons in an isotope or element.
Explanation: The atomic number is the same number of protons in an element or isotope and if said isotope is neutral than it is the same number of electrons.
Example: Atomic number = 19 Protons = 19 if neutral Electrons = 19
Answer:
The ratio of the products to reactants remains caonstant over time
Explanation: