2. a gray crystalline allotropic form of carbon which occurs as a mineral in some rocks and can be made from coke. It is used as a solid lubricant, in pencils, and as a moderator in nuclear reactors.
3.The second graphite grading scale is known as the HB scal
4. As the concentration of hydrogen ions in a solution increase, the more acidic the solution becomes. ... Thus, as the hydrogen ion concentration increases hydroxide ion concentration falls, and vice versa.
There are four qualities of triads that appear in major and minor scales, each with ... doing so uses Roman numerals to designate the scale degree of the chord's root. ... In major keys, chords with the same Roman numeral are made.
