Number of neutrons = mass number - atomic number
= 99-29 = 70
Answer:
A. Dry with low humidity
Explanation:
Atmosphere is the layer of gases that surrounds the earth above air layer. Its conditions affect our climate.
The hydrosphere includes the water which is on the surface of the earth,below the ground and in the air.
Tropics are the region of our earth surrounding the equator.
On analyzing the climatic conditions in the tropics due to the interaction of the atmosphere and hydrosphere, the presence of water droplets in tropics is less resulting in less humidity and, thus the climatic condition is dry.
Therefore the climatic condition that is typically found in tropics due to interaction of the atmosphere and hydrosphere is dry with low humidity.
D is the answer. A, B,C are absurd. Doing a little word right there.
Is B. The number of the atomic mass can increase or decrease because the number of neutrons is different.
