Answer:
Carbon
Explanation:
The non metal in the same group as Pb is carbon or C .
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In gas the speed of sound is 343.2 meters per second, in liquid the speed of sound is 1,484 meters per second and in solids like steel it travels 5,120 meters per second.
Convection
Convection<span> is when heat is transferred by mass motion of a fluid.
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<span>Calcium. It is classified chemically as one of the alkaline earth elements. It is found in group two of the periodic table. It forms a white coating of calcium nitride (Ca3N2) in air. The symbol is classified as Ca. It is a metallic metal.</span>
True because photon is a composite particle of a neutrino. It is solely based on the fact that emission and absorption of a photon corresponds to the creation of annihalation.
