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

---

Definitions:

Vertebrate

Animal with a backbone.

Hot Temperature

A condition or degree of heat that is considerably higher than what is considered comfortable or normal to living organisms and their environments.

Tubular Secretion

Ions and breakdown products of organic molecules move out of peritubular capillaries and into filtrate.

Distal Tubules

Sections of the nephron in the kidney that further process the filtrate after it passes through the proximal tubule, playing a key role in acid-base balance and salt regulation.