Because electrons add to the atomic mass, while it is very slim (around 1/2000 of a proton) their mass is what causes the decimals on atomic masses
Answer:
Ос.
The spacing between particles increases.
Heat causes greater particle activity, and the particles
are farther apart.
<span>Wind is nature's way of balancing the temperature between hot and cold. Wind always flows from heat to cool. When night falls, the air cools. And since it gets cooler at night it reverses.</span>
