Q- 2.42 An element with mass number 81 contains 31.7% more neutrons as compared to protons. Assign the atomic symbol.

Answer

Let the number of protons in the element be x. ∴ Number of neutrons in the element

= x + 31.7% of x

= x + 0.317 x

= 1.317 x

According to the question,

Mass number of the element = 81

∴ (Number of protons + number of neutrons) = 81

Hence, the number of protons in the element i.e., x is 35.

Since the atomic number of an atom is defined as the number of protons present in its nucleus, the atomic number of the given element is 35.

∴ The atomic symbol of the element is

Answer

Let the number of protons in the element be x. ∴ Number of neutrons in the element

= x + 31.7% of x

= x + 0.317 x

= 1.317 x

According to the question,

Mass number of the element = 81

∴ (Number of protons + number of neutrons) = 81

Hence, the number of protons in the element i.e., x is 35.

Since the atomic number of an atom is defined as the number of protons present in its nucleus, the atomic number of the given element is 35.

∴ The atomic symbol of the element is

thanks

ReplyDeleteWelcome

DeleteThank you so much

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ReplyDeleteHow do we get 2.317x. ?

ReplyDeleteAs we got 1.317x

DeleteX means1×x.So (1+1.37)x implies or equal to 2.137x

DeleteHow do we get 2.317

ReplyDeleteThere is the addition of X and 1.317x, only X means 1x so 1 +1.317 =2.317

DeleteThank you sir

ReplyDeleteThis comment has been removed by the author.

ReplyDeleteFrom where we get 0.317

ReplyDelete31.7% can be converted as that in percentage to (31.7×100=0.317)

DeleteTq

ReplyDeleteThank you

ReplyDeletethank u thank u thank u so much😍😍😍

ReplyDeleteThnx

ReplyDeleteThanks 😀

ReplyDeleteThanks for solution

ReplyDeleteFrom where we get 31.7 to 0.317

ReplyDeleteHow do we get 1.317x

ReplyDelete