Answer:
B:A metal surface is acting as a catalyst and lowers the activation energy of bond breaking of hydrogen gas.
Answer:
Answer is on the foto.
Explanation:
Complete Lewis formula is on picture 2
Answer:
Nuclear fission
Explanation:
Because the little particles are being spread out and the two elements are broken apart
Answer:
liver and esophagus.
Explanation:
Kidneys are part of the endocrine system, trachea and bronchi are part of the respiratory system