The Only Known Atom That Does Not Contain a Neutron

question 17

Multiple Choice

The only known atom that does not contain a neutron is one of the isotopes of hydrogen.The mass number,symbolized as "A" in the text,of this hydrogen isotope must be:

• A)1.01
• B)0
• C)1
• D)2
• E)none of the above

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Definitions:

Evolutionary Placement

The determination of the position or relationship of an organism or a group of organisms within an evolutionary tree, showing how species are related to each other.

Neandertals

An extinct species of humans who lived in Eurasia until approximately 40,000 years ago, known for their robust build and large brain capacity.

Earliest Primates

The initial members of the primate order, dating back to the Paleocene epoch, ancestral to modern primates including humans, apes, monkeys, and prosimians.

Bipedalism

The ability to walk upright on two legs, a key feature in human evolution.