b - protons, neutrons, and electrons
subatomic particles are the smallest particles within an atom.
a would be incorrect as the nucleus is composed of said subatomic particles (protons and neutrons).
c is incorrect as orbitals are used to describe the amount of electrons based on each shell, thus, deeming them inaccurate to the term of subatomic particles.
d is incorrect as, once again, the nucleus is comprised of subatomic particles and is not a subatomic particle itself.
hope this !
one mole of methane has a mass of 4*1 + 12
= 16 grams.
so 32g is 2 moles of methane.
now we use avogadro's number:
i mole of an elements contains 6.022 * 10^23 molecules so the answer is 2 * 6.022 * 10^23
= 12.044 * 23 molecules.