The atomic number, or number, is the described as the number of in the nucleus of an chemical element. a) proton, protons b) photon, photons c) neutron, neutrons d) electron, electrons

Option (A) is the correct answer.

Explanation:

Atomic number is defined as the sum of total number of protons present in an atom. Each element has different atomic number.

And, atomic mass is the summation of total number of protons and electrons present in the nucleus of an atom.

For example, atomic number of fluorine is 9 which also means that a fluorine atom contains 9 protons.

Thus, we can conclude that the atomic number, or proton number, is the described as the number of protons in the nucleus of a chemical element.

grav forces affect all objects magnetic forces affect magnetic objects and electric currents

we have been given a quadratic function and we need to restrict the domain such that it becomes a one to one function.

we know that vertex of this quadratic function occurs at (5,2).

further, we know that range of this function is .

if we restrict the domain of this function to either or , it will become one to one function.

let us know find its inverse.

upon interchanging x and y, we get:

let us now solve this function for y.

hence, the inverse function would be if we restrict the domain of original function to and the inverse function would be if we restrict the domain to .