<span>d)Electrons need specific amounts of energy to "jump" off an atom and be emitted.</span>
It is actually Group 3A elements. I just took the test.
How many hydrogen atoms are involved in this reaction? 3
<span>In normal conditions gas particles remain very distant from each other. They rarely collide and are stable. When temperature increases the gas particles begin to move faster and collide more, reducing the distance. When pressure increases the gas particles also pick up kinetic speed and are also closer to each other.</span>