Question

The fundamental particles present in equal numbers in neutral atoms (atomic number 71) are_______.
A. Protons and electrons
B. Neutrons and electrons
C. Protons and neutrons
D. Protons and positrons

Answer 1

Hint: The number of protons in the nucleus of the atom is equal to the atomic number The number of electrons in a neutral atom is equal to the number of protons.The mass number of the atom is equal to the sum of the number of protons and neutrons in the nucleus.

Complete step by step answer:
Dalton's Atomic Theory clarified a great deal about issue, synthetics, and compound responses. In any case, it was not totally precise, on the grounds that as opposed to what Dalton accepted, iotas can, truth be told, be broken separated into more modest subunits or subatomic particles. We have been discussing the electron in incredible detail, however there are two different particles important to us: protons and neutrons. We previously discovered that J. J. Thomson found an adversely charged molecule, called the electron. Rutherford suggested that these electrons circle a positive core. In ensuing tests, he found that there is a more modest decidedly charged molecule in the core which is known as a proton. There is a third subatomic molecule, known as a neutron.
Particles don't generally contain a similar number of electrons and protons, in spite of the fact that this state is normal. At the point when a molecule has an equivalent number of electrons and protons, it has an equivalent number of negative electric charges (the electrons) and positive electric charges (the protons). The complete electric charge of the molecule is along these lines zero and the iota is supposed to be impartial.

So, the correct option is A. Protons and electrons

Note:
The neutral state of an atom is typically the most stable configuration (unless molecular bonds and the chemical environment complicates the picture), so ions tend to discharge and return to their neutral state over time.