Question

1. an atom has 18 neutrons and 17 protons.
a) How many electrons are in this atom?
b) What is the mass number of this atom?
c) Draw the structure of the atom and show its electronic configuration.
d) State the possible name of the element with the atomic number 17.

Answer 1

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an atom has 18 neutrons and 17 protons.

a) How many electrons are in this atom?

b) What is the mass number of this atom?

c) Draw the structure of the atom and show its electronic configuration.

d) State the possible name of the element with the atomic number 17.

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a) How many electrons are in this atom?

Answer: Electrons orbiting around the nucleus of an atom are arranged in shells — also known as “energy levels.” The first shell can hold only two electrons, while the next shell holds up to eight electrons. Subsequent shells can hold more electrons, but the outermost shell of any atom holds no more than eight electrons.

b) What is the mass number of this atom?

Answer: Mass number of an atom is defined as the sum of the number of protons and number of neutrons. Mass number is nearly equal to the atomic mass of an atom. Since, protons and neutrons reside in the nucleus, thus they are also known as nucleons. This means. Mass number of an atom = Number of protons + Number of neutrons.

c) Draw the structure of the atom and show its electronic configuration.

Answer: in the attachment...

d) State the possible name of the element with the atomic number 17.

Answer: Chlorine

Chlorine is a chemical element with symbol Cl and atomic number 17.

hope that helps...