Which of the following is not a major characteristic used to identify minerals? a. hardness b. density c. magnetism d. luster

Minerals are solid substances that are crystalline in nature. Physical and chemical properties help distinguish one mineral to another. Physical properties of minerals include: Color, hardness, density, luster, fluorescence while chemical properties include magnetism, optical properties etc. Answer is B. as one mineral can have the same density as another

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.