The nucleus or center _area of the atom contains two kinds of subatomic particles. which two?
a) protons and electrons
b) protons and neutrons
c) electrons and neutrons
i think it's a

The correct answer is Option B.

Explanation:

There are 3 subatomic particles present in an atom. They are: protons, electrons and neutrons.

Any neutral atom has equal number of protons and electrons.

Nucleus contain two sub atomic particles which are neutrons and protons. They are used to determine the mass of an atom.

Hence, the correct answer is Option B.

nacl or sodium chloride is an ionic compound. this is because an ionic compound pertains to a compound that consists of positively and negatively charged ions. in this case, na (sodium) has a tendency to lose one electron when it reacts with with other atoms, so the resulting sodium ion contains 11 protons and 10 electrons, thus making it positively charged (na+), when chlorine reacts, it usually gains one electron to form an ion called chloride, thus making it negatively charged ( since the ions are oppositely charged, they attract.