Science Application: An atom consists of charged particles called… - Vidyadip

Question

Science Application: An atom consists of charged particles called electrons and protons. Each proton has a charge of $+1$ and each electron has a charge of $-1.$ Remember number of electrons is equal to number of protons, while answering these questions: What is the charge on an atom$?$

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Answer

Let $a$ be the number of electrons in an atom. Number of protons in the atom,
will also be equal to a. Since, an atom has equal number of protons and electrons.
$\therefore$ Charge on one electron $= (-1)$
$\because$ Total charge in a electrons $= a \times (-1) = -a$
$\therefore$ Charge on one proton $= (+1)$
$\because$ Total charge in a protons $= a \times (+1) = +a$
Hence, total charge on the atom $=$ Charge of electrons $+$ Charge of protons $= -a + a = 0$

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