Which of the following best demonstrates the effect of static friction? A. A person pushing a couch and it slowly sliding across
a floor B. A person moving a ball through a stream of water C. A person dropping a ball to the ground. D. A person pushing a couch without being able to move it
1 answer:
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Answer:
Explanation:
Atomic number : It is defined as the number of electrons or number of protons present in a neutral atom.
However, when we talk about the atomic number of the ion, it is not equal to the number of electrons as electron can be gained or loosed.
This is why, more appropriately, the number of the protons which are present in the nucleus of the atom is called the atomic number.
Thus, atomic number of phosphorus = 15
Mass number is the number of the entities present in the nucleus which is the equal to the sum of the number of protons and electrons.
Given, Mass number = 32
Thus, the symbol of the isotope is:-