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Vikentia [17]
3 years ago
7

Electrons and protons are particles in an atom with equal but opposite charges. Electrons have a negative charge and protons hav

e a positive charge. What is the charge amount of an atom with 2 more electrons than protons?
Mathematics
1 answer:
MakcuM [25]3 years ago
7 0

Answer:

-3.2\cdot 10^{-19}C

Step-by-step explanation:

- Protons are positively charged particles contained in the nucleus of the atom. They have a charge of q_p=+1.6\cdot 10^{-19}C

- Electrons are negatively charged particles orbiting around the nucleus of the atom. They have a charge of  q_e = -1.6\cdot 10^{-19}C

For a neutral atom, the number of protons is equal to the number of electrons, so the total charge of a neutral atom is:

Q=Nq_p + Nq_e = N(q_p+q_e)=N(+1.6\cdot 10^{-19}-1.6\cdot 10^{-19})=0

In this problem, we have an atom having an excess of 2 electrons, i.e. it has 2 more electrons than protons.

Therefore, the charge of this atom will be:

Q=0+2q_e

and substittuing, we find

Q=2(-1.6\cdot 10^{-19})=-3.2\cdot 10^{-19}C

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