The answer is A.
A pure substance is pure, so it cannot be separated in most cases.
its conduction
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Let me know if ther is an error in my answer
1) H
2) He
3) Li
4) Be
5) B
6) C
7) N
8) O
9) F
10) Ne
11) Na
12) Mg
13) Al
14) Si
15) P
16) S
17) Cl
18) Ar
19) K
Answer:
CO contains polar covalent bond, because these atoms share unequal electrons.
