Check the attached file for the solution.
The shape is in the next file.
<span> A pure substance is a sample of </span>matter<span> with both definite and constant composition with distinct </span>chemical properties<span>. To avoid confusion, in chemistry a pure substance is often referred to as a "chemical substance".</span>
Answer: The answer is C
covalent bonds have a lower melting and boiling point
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Answer:
Because X-rays have wavelengths similar to the size of atoms
Explanation:
hope the picture above help u understand:)
