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The boiling point of water is a characteristic physical property, because the water won't boil until it reaches the boiling point.
The answer to this question would be: covalent bond
Silicon dioxide or SiO2 is made of silicon which is a metalloid and oxygen which is a gas. The bond that the molecule made is a polar covalent bond because silicon is not a real metal. Silicon dioxide is a polymorph that has many different kinds of crystal form.
They are the two biggest plants in the milky way. Hope this helps!!
