Answer:compound is a poly element pure substance
Explanation:
It made up of two or more elements.
It can be broen down into simpler units
Answer: Oxygen
Explanation: Oxygen is the most common element in the human body. It makes up 65% of the body.
Answer:
156.67 m/s
0.45676 times the speed of sound
Explanation:
Distance from the ground = 23.5 km = 23500 m
Time taken by the blast waves to reach the ground = 
Spedd of the wave would be

The velocity of the blast wave is 156.67 m/s
v = Velocity of sound = 343 m/s

The blast wave is 0.45676 times the speed of sound
<span>There are 5 different values of ml in the 5d sublevel (-2, -1, 0, 1, and 2).</span>