Question

In which of these cases do we have enough information to say that the atom is electrically neutral?

A. The atom has 15 neutrons and 15 electrons.
B. The atom has 7 protons and 7 electrons.
C. The atom has 4 neutrons and 4 protons.
D. The atom has 19 electrons and 19 neutrons.

Answer 1

B protons are positive and electrons are negative kinda like when to people push on a wall with the same force

Answer 2

Answer : The correct option, (B) The atom has 7 protons and 7 electrons

Explanation :

An atom is electrically neutral when the number of protons are equal to the number of electrons.

From the given options, option B have enough information to say that the atom is electrically neutral because in this the number of protons is equal to the number of electrons.

While the other options, A, C and D will not provide enough information to say that the atom is electrically neutral.

Thus, the correct option is, (B)