Answer:
disagree, an atom has two main parts. the nucleus & electron cloud. Atoms have three subatomic particles: protons, neutrons, and electrons.
Most atoms have three different subatomic particles inside them.
Explanation:
The heart and the arteries of a person, both contracts to pump the blood throughout the body. The aorta, which is the largest artery of the human body, pumps the blood from the heart to the entire body of a person. The oxygen-rich blood is pumped out of the left ventricle when its contraction into the aorta, from where it is transported to the whole body.
Hence, the given statement is true.
20 Amino acids is the answer
