A black stone was discovered to have magnetic properties. a) What was this stone first called?

b) What is its modern mineral name?

a) this stone was first called Schorl stone

b)the first modern name for this mineral was Black tourmaline

Explanation:

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what is the question because that is not a question.

the order for strong to weak forces such as

strong nuclear force → electromegnetic force → weak nuclear force → gravitational force

the fundamental forces are those forces that act between to objects or element to make interactions. there are four types of fundamental forces such as strong and weak nuclear forces (due to protons and electrons), electromagnetic force (due to the motion of electrons) and gravitational force (due to orbital movement of the planet). if these forces are arranged on the basis of their maximum strength then the order is

strong nuclear force → electromegnetic force → weak nuclear force → gravitational force