Question

Considering the following diagram calculate the atomic mass of the

element ‘X’.​

Answer 1

Answer:

The atomic structure of an element represents the distribution of electrons in different atomic orbitals. Using the atomic structure, we can find out the atomic number. As every element has a unique atomic number, we can identify the element from its atomic number.

In the given structure, the total number of electrons present is 18, and the distribution is (2, 8, 8). So, the element is Argon, and option C is correct.

Answer 2

Answer:

The atomic mass of the given element X is $14$ and the element is Nitrogen·

Explanation:

We know that,

The nucleus is present at the center of every atom which has a positive charge· The positive charge is because this nucleus contains positively charged protons and the chargeless neutrons· So, the charge of the nucleus becomes positive·

This nucleus is surrounded by negatively charged electrons which are orbiting in a fixed circular path around the nucleus· These circular paths are called orbitals·

The number of neutrons, protons, and electrons varies with elements·

Let's analyze the picture to find out the element X·

Here,

The blue-colored rounds present at the center which is the nucleus of the atom are protons· We understand these are the protons because they are positively charged·

The red-colored rounds present at the nucleus are neutrons because they are chargeless·

The yellow-colored rounds around the nucleus are electrons because they are negatively charged and move in a fixed circular path·

The number of protons  $=$ $7$ p

The number of neutrons $=$ $7$ n

The number of electrons $=$ $7 \ e^-$

From the picture, the electronic configuration of this element follows $2,5.$

We know that,

Atomic number, Z of an element is the same as the number of protons and number of electrons·

That is,

Atomic number $=$  Number of protons  $=$  Number of electrons

So the given element X has an atomic number of $7$·

Also, we know that

The atomic mass of an element is the sum of the number of neutrons and the atomic number

That is,

Atomic mass  $=$  Number of neutrons $+$ Atomic number

Therefore,

Atomic mass  $=$  $7\ +\ 7\ =\ 14$

So, the given element X has an Atomic mass of $14$

From the above information, we get that the element X has an atomic number of $7$ and an atomic mass of $14$· So, the element X is Nitrogen·

Hence,

The atomic mass of the given element X, Nitrogen is  $14$ g·