Question

Atomic number of an element is considered to be a more appropriate parameter than its atomic mass for a chemist take example of element X(atomic no. 13) to justify the statement

Answer 1

we know, atomic number gives us the number of protons whereas atomic mass gives us the sum of number of neutrons and number of protons in the nucleus of an atom.

therefore, when atomic number increases by one in going from one element to the next but atomic mass doesn't vary regularly from element to element.

atomic number of element is fixed. but atomic mass doesn't. for example, atomic number of carbon atom is 6 but it has atomic mass of carbon may have 12, or 14(it is known as isotopic nature of elements)

That is why atomic number of an element is considered to be a more appropriate parameter than its atomic mass.

atomic no : 13 , Aluminium. it is metallic in nature.
it's electronic configuration is 1s², 2s²,$2p^6$, 3s², 3p¹
here last electron enters in p- orbital . so, aluminium belongs to p- block.
group of aluminium = 10 + valance electron
= 10 + 3 = 13 [ valance electron of Al = 3 ]
principal quantum number is 3 so, aluminium is 3rd period element.

here, you can see how easily we locate Aluminium in periodic table and by to find electronic configuration using atomic number, how we understand its characters.

Answer 2

Atomic number of an element is considered to be a more appropriate parameter than its atomic mass for a chemist.

Explanation:

• The atomic number is representing the number of protons present in the nucleus of an element.
• Atomic mass is representing the total numbers of protons and neutron present in the nucleus of an element.
• For any chemist, the atomic number plays a significant role because with its value, he or she can easily find out the electronic configuration and valency of an electron.
• It has been proved that the chemical properties of any element are depending on its valency of an electron as well as on its electronic configuration.
• The value of the atomic mass is not useful for any chemist as it contains numbers of neutrons in it.

To Know More:

Atomic number of an element is considered to be a more appropriate parameter than its atomic mass for a chemist take example of element X(atomic no. 13) to justify the statement

https://brainly.in/question/8765342

"Atomic number of an element is considered to be an appropriate parameter than its atomic mass for a chemist." Take the example of the element X ( atomic number 13 ) to justify this statement.

https://brainly.in/question/8759355