<span>Valence electrons are important because these are the only electrons involved with an atom's chemical reactivity.</span>
Number one would be Decades
Each of the prefixes means a different thind:
Nano means 0.000000001
Kilo means 1000
Milli means 0.001
Centi means 0.01
Out of these four, the biggest is b: 1 kilogram
The change in energy is is known as work-energy
