An Atom of Helium Has a Mass About Four Times

question 103

Multiple Choice

An atom of helium has a mass about four times greater than that of an atom of hydrogen. Which choice makes the correct comparison of the redative numbers of helium and hydrogen atoms in equal masses of the two elements

• A) There are about four times as many helium atoms as hydrogen atoms.
• B) There are about two times as many helium atoms as hydrogen atoms.
• C) The number of helium and hydrogen atoms is the same.
• D) There are about half as many helium atoms as hydrogen atoms.
• E) There are about one-fourth as many helium atoms as hydrogen atoms.

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Definitions:

Thermodynamics

The branch of physics that deals with the relationships between heat and other forms of energy, and the laws governing the conversion of heat into work.

Energy

The capacity to do work or produce change, existing in various forms such as kinetic, potential, thermal, and chemical energy.

Parts Per Trillion

A unit of measurement used to denote extremely small concentrations of a substance in another, equivalent to one part in 10^12 parts.

Nuclear Change

Alterations at the atomic nucleus level, including nuclear reactions such as fission, fusion, and radioactive decay, releasing significant amounts of energy.