Answer:
Either c or d.
Explanation:
Sorry probs not alot of help o.o
Answer:
Valence electrons are the most important electrons to an atom.
Explanation:
They will determine many of the atoms traits since they are involved in bonding with other atoms.
Speed is how fast something is going, velocity is speed and distance, and acceleration is how fast something is speeding up.
Explanation:
P₄+O₂=P₂O₃; non-balanced
P₄+O₂=2P₂O₃; to add '2' on the right side; non-balanced
P₄+3O₂=2P₂O₃. to add '3' before O₂ in the left side; balanced