The various atomic masses of the same element are called<u> isotopes</u>. They have the same number of protons but different number of neutrons.
The answer to this is t<span>he atom is mostly empty space.</span>
Answer:
A. True
Explanation:
The octane number is determined by comparing the characteristics of gasoline to isooctane (2,2,4-trimethylpentane) and heptane. The correct option is option A.
Basically, the higher the octane number, the greater the resistance of the gasoline to knocking.
Polyester and polyamide would be two synthetic polymers, created by condensation reaction.
