An element has 56 nucleons in nucleus and if it is isotonic with Y30 ^60. Which group and period does it belong to ?
URGENT PLS ANSWER
Answers
Answer: 8th group, 4th period
Explanation:
Answer:
(1) 8th group, 4th period
Explanation:
Given, the element has 56 nucleons.
Nucleons are basically entities that form the nucleus, that is protons and neutrons.
Basically, No. of protons + No. of neutrons = 56.
Also, the element is isotonic with ₃₀Y⁶⁰ [Given].
Isotonic elements are those having same number of neutrons but different mass and atomic number.
In Y, no. of protons = atomic number = 30
therefore, no. of neutrons in Y = Mass of Y - Number of protons {Because mass of an element is given by no. of protons + no. of neutrons}
no. of neutrons in Y = 60 - 30 = 30.
Since Y and the asked element are isotonic, no. of neutrons in the asked element = 30
therefore, no. of protons = no of nucleons - no. of neutrons = 56 - 30 = 26.
therefore, atomic no. of the asked element = no. of protons = 26.
Now we are required to find the group and period in which element with atomic number 26 will lie.
therefore, period will be 4th and group will be 8th.
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