Question

In a neutral atom $n_e$ and $n_p$ represent number of electrons & protons, then

• A. $n_e<n_p$
• B. $n_e=n_p$
• C. $n_e>n_p$
• D. none of these

Answer 1

Answer: (B)

$n_e=n_p$

No. of electrons $=$ no. of protons

Given an atomic number (Z) and mass number (A), you can find the number of protons, neutrons, and electrons in a neutral atom. For example, a lithium atom (Z=3, A=7 amu) contains three protons (found from Z), three electrons (as the number of protons is equal to the number of electrons in an atom), and four neutrons (7 – 3 = 4).