B has two isotopes (19%) and (81%)

CHEMISTRY · Single correct · A Level · Chemistry · Atomic structure · Atomic structure

Problem

B has two isotopes

{}^{10}\text{B}

(19%) and

{}^{11}\text{B}

(81%). The atomic mass of B is (1) 10.81 (2) 11.5 (3) 11 (4) 10.5

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