7. in which of the following cases does an atom have a positive charge?
a. there are more neutrons than electrons
b. there are more electrons than protons.
oc. there are more protons than electrons.
od. there are more electrons than neutrons.

The correct answer is: There are more protons than electrons.. See the explanation below, please.

Explanation:

Protons and neutrons are located in the nucleus of the atom, electrons instead, move around the nucleus. The positive charge is given by protons, negative by electrons, and in the case of neutrons it has no net charge. If the number of protons is greater than that of electrons, the charge balance will be positive.

There are more protons in electrons

Explanation:

An element can divide into smallest driblets called atoms maintaining its chemical identity. They have neutral charge normally as they have same number of electron and proton.  It has positive protons and negative electrons.

We can say an atom has positive charge when it has positive protons in more number and some electrons missing in it. It will be negative in charge of electrons are more in number.

the answer is :