The Ratio of the Numbers of Neutrons to Protons in the Nucleus

question 12

Multiple Choice

The ratio of the numbers of neutrons to protons in the nucleus of naturally occurring isotopes tends to vary with atomic number in what manner?

• A)increases with greater atomic number
• B)decreases with greater atomic number
• C)is maximum for atomic number = 60
• D)remains constant for entire range of atomic numbers

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Definitions:

Scientific Method

A systematic process for gathering knowledge and testing scientific theories and hypotheses through observation and experimentation.

Hypothesis

A proposed explanation for a phenomenon, made as a starting point for further investigation, which can be tested through research and experimentation.

Theory

A coherent group of propositions formulated to explain a group of facts or phenomena in the natural world and repeatedly confirmed through experiment or observation.

Operational Definition

A definition that provides an objective description of how a variable is going to be measured and observed in a particular study.