Which of the following apply to the property of hardness. select all that apply. hardness is determined through a complicated process that requires expensive instruments. hardness is a physical property. hardness is indicative of the strength of chemical bonds between elements. friedrich mohs developed the standard hardness scale. diamond can scratch quartz.

The correct answers are options  B, D and E.

The property of hardness are:

Hardness is a physical property.

Friedrich Mohs developed the standard hardness scale.

Diamond can scratch quartz.

Mohs' scale of hardness is used to rate minerals with 1 being softest and 10 being hardest. Determination of hardness requires no expensive instrument. It is a physical property that is tested by scratching one substance over the surface of another.

so here we go

atomic mass

239 + 1 = y + 134 + 3 combine like terms

240 = y + 137             subtract 137 from both terms

240 - 137 = y

103 = y

atomic number

94 = z +54 + 0

94 = z + 54               subtract 54 from both sides.

40 = z

answer

1 is the answer to this problem