How Many Protons (P)and Neutrons (N)are in an Atom of

question 275

Multiple Choice

How many protons (p) and neutrons (n) are in an atom of Ra?

• A)88 p,138 n
• B)88 p,226 n
• C)138 p,88 n
• D)226 p,88 n

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Definitions:

Sampling Techniques

Methods used in statistics to select individual observations intended to yield some knowledge about a population of concern.

Primary Research

The collection of original data through direct methods such as surveys, interviews, experiments, or observation, as part of a research study.

Secondary Research

The process of synthesizing existing research and information, as opposed to collecting new data.

Controlled Before-after

An experimental research design that compares the outcomes of a group subjected to a treatment with its conditions prior to the treatment.