JEE Main 2026 · 4 Apr · Shift 1 · Chemistry Q58

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ChemistrySingle correct+4 / -1Question 58 of 75

A monoatomic anion ( $\ce{A-}$ ) has 45 neutrons and 36 electrons. Atomic mass, group in the periodic table and physical state at room temperature of the element (A) respectively are

80, 17, liquid

81, 16, solid

80, 16, gas

81, 15, gas

Answer and worked solution

Official answer: A

Identify A. The anion $\ce{A-}$ has 36 electrons, so $Z=35$ : bromine. Mass number $35+45=80$ .

Properties. Group 17, liquid at room temperature.

(A)

Topics:Periodic table Electronic configuration

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JEE Main 2026 · 4 Apr · Shift 1, Chemistry question 58