If the nucleus was the size of a tennis ball, the atom would be the size of a sphere about 1,450 feet in diameter.
The size of one atom would be comparable to one of the world's largest sports stadiums if the nucleus were the size of a tennis ball, or around 1,450 feet in circumference.
There are protons, neutrons, and electrons, three types of subatomic particles. Protons and electrons, two of the subatomic particles, each carry an electrical charge of one or the other.
Electrically charged protons and electrically neutral neutrons make up atomic nuclei. The strongest basic force known to science, often known as the strong force, holds these things together.
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B)farm land
C)highways
D)public transportation
Answer: Option (A) is the correct answer.
Explanation:
An urban area is an area which is developed and it is a place where people can get almost all the things of their need easily.
Therefore, more an more people would like to live in an urban area as there will be more resources which can make people's work easy.
Hence, we can conclude that out of the given options an urban area is characterized by a dense human population.
a. iodine.
b. water.
c. calcium.
d. air.