What is the relationship between the number of
half-life cycles and the elapsed time in seconds or
minutes?
They are the same quantity.
They are proportional to each other.
They are inversely proportional to each other.
They are not related to each other.

b) They are proportional to each other.

Explanation:

the number of protons in the nucleus of a given element. has slight luster and conducts electricity at high temperatures like metal.but like a nonmetal,boron is brittle and does not conduct electricity well at low temperatures. in graphite, carbon is a soft,brittle solid.it is reflective,ductile,or malleable.