1. Which of the following are properties of non-metals? A. mostly solids, dull, brittle, reactive, conductors
B. mostly solids, luster, high density, conductors
C. mostly gases, brittle, dull, low density, insulators
D. solids, luster, brittle, conductors, medium density

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Answerd. may include all of these are many definitions of bases: the  brønsted-lowry definition of acids and bases says that bases are proton acceptors.the arrhenius definition of acids and bases says that bases increase [oh⁻] in solution (thereby producing oh⁻ ions)the lewis definition of acids and bases says that bases donate electron pairs.therefore, the sensible answer is that a base may include all of the described characteristics.

Answerhave membrane-bound organelles;