Question

Write a brief passage describing a neutral atom of nitrogen-14 (N-14). Describe the number of protons, neutrons, and electrons in the atom, where each type of particle is located, and how the terms atomic number, mass number, and atomic mass are related to the particles. Use the periodic table to help you.

Answer 1

Answer:

Explanation:

To describe an atom of N-14, one must know the subatomic particles composed in it.

An atom is considered as the smallest particle that takes part in a chemical reaction. In an atom, the subatomic particles are the protons, neutrons and electrons.

The protons and neutrons are located in the nucleus at the center of the atom. These particles are the most massive in an atom and they determine the mass of the atom. The mass number of an atom is the sum of the number of protons and neutrons.

The extra-nuclear space is occupied by electrons. Electrons have little to no mass but the occupy the bulk volume in an atom. These particles are negatively charged.

In a neutral atom of N-14, we know for sure that the atom has not lost or gained electrons.

We can identify that N-14 is a nitrogen atom with a mass number of 14.

The periodic table arranges elements based on their atomic number. The atomic number is the number of protons. The number of protons in nitrogen is 7 based on the periodic table of elements. Due to the neutral nature of the atom, the number of protons and electrons are the same. Therefore, the atom has 7 electrons.

Since the mass number = number of protons + number of neutrons

         number of neutrons = mass number - number of protons

          number of neutrons = 14 - 7 = 7

The protons are positively charged particles and neutrons carry no charges.

Answer 2

Answer:

Atomic number = number of electrons = number of protons

We get to know the atomic number of Nitrogen as 7 from the periodic table.

So Nitrogen contains 7 protons and 7 electrons.

To find the number of neutrons we make use of the formula  

Mass number - atomic number = number of neutrons

So number of neutrons in a Nitrogen atom =14-7=7 neutrons.

Atomic mass of Nitrogen is 14.0067 amu.

Average Atomic mass is the sum of the atomic mass of the isotopes multiplied by the abundance

Thats why we get a fractional number as atomic mass.

If suppose an element has 3 isotopes then,

Average atomic mass

$\frac{(\text {atomic mass of Isotope1 } \times \% \text { Abundance) }}{100} \%+\frac{\text { (atomic mass of Isotope2 } \times \% \text { fo Abundance) }}{100} \%$ $+\frac{\text {atomic mass of Isotope } 3 \times \% \text { Abundance }}{100}$

Is the formula to find the average atomic mass of an element.

So the Answer is Nitrogen atom has 7, protons 7, electrons and 7 neutron