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A fictional element has two naturally occurring isotopes with the natural abunda

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A fictional element has two naturally occurring isotopes with the natural abunda

A fictional element has two naturally occurring isotopes with the natural abundances shown here:

ISOTOPE   ABUNDANCE
18   40.0%
20   60.0%

Which statement is TRUE for this element?
A) The atomic mass would be less than 18.
B) The atomic mass would be closer to 18 than to 20.
C) The atomic mass would be exactly 19.
D) The atomic mass would be closer to 20 than to 18.
E) The atomic mass would be greater than 20.

Textbook

Introductory Chemistry Essentials

Edition: 5^th

Author: Tro

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