ক) আইসোটোপ কাকে বলে? খ)পারমাণবিক সংখ্যা বলতে কি বুঝ? গ)উদ্দীপকের ছকে উল্লেখিত z মৌলের 1 টি পরমানুতে বিদ্যমান নিউট্রন সংখ্যা নির্ণয় কর? ঘ) উদ্দীপকের ছকে উল্লেখিত x ও y মৌলটির পরমাণু সমূহের মধ্যে যৌগ গঠন সম্ভব- যুক্তি সহ বিশ্লেষণ কর?
Answers
Answer:
A) What is an isotope called?
Answer: Atoms that have the same number of protons but different numbers of mass and number of neutrons are called isotopes of each other.
B) What do you mean by atomic number?
Answer: Atomic number refers to the number of protons:
The number of protons present in the nucleus of an atom of an element is called the atomic number of that element.
That atom can be identified by the atomic number of an atom. The number of protons or atomic number is expressed by Z.
C) Find the number of neutrons present in 1 atom of element Z mentioned in the stimulus table.
Answer: The element Z mentioned in the stimulus is C (carbon). Determining the number of neutrons present in an atom of carbon element-
Given,
Number of atoms of neutrons / number of protons, Z = ৬ and, mass, A = 14
Thus, neutron number = mass number - proton number
= A-Z
= 14-7
=
Thus, the number of neutrons present in an atom of carbon element is 6;
D) It is possible to form compounds between the atoms of the two elements X and Y mentioned in the stimulus table - analyze logically.
Answer: The X element mentioned in the stimulus is Chlorine (Cl) and the Y element is Sodium (Na).
It is possible to form compounds between the two elements.
The elements sodium and chloride form two ionic compounds. The compound formed by the exchange of electrons between two elements is called ionic compound.
Here sodium is metal and chlorine is non-metal. Ionic bonds are formed during the formation of compounds between metals and non-metals.
We know that sodium has 11 electrons and chlorine has 17 electrons.
The last orbit of the sodium element has 1 electron and the last orbit of the chlorine element has 8 electrons.
Every atom wants its last orbital electron octave to be full or to have the structure of an inert gas.
Thus, sodium leaves its last orbital electron and completes the octave, and chlorine receives that electron to form the structure of argon.
From the above discussion, it is possible to form ionic compounds between the atoms of the elements X and Y.
That is, the combination of sodium and chlorine makes it possible to form sodium chloride (NaCl). This is a sign of table salt.
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