Answer:
helium hydrogen
Explanation:
lithium beryllium bottom carbon
CFC-11 is typically the CFC with the shortest atmospheric lifetime.
Answer:
the velocity is 25 m/s
Explanation:
The computation of the velocity is shown below:
As we know that
Magnitude of Momentum = (mass) × (speed)
75 kg. m/s = 3 kg × speed
So, the speed is
= 75 ÷ 3
= 25 m/s
hence, the velocity is 25 m/s
i think it is 6 valence electrons
