In 1913, an Element Was Known to "Emanate" from Radium-226

question 109

Multiple Choice

In 1913, an element was known to "emanate" from radium-226 by  emission and then to decay to polonium-218, also by  emission. What was the unknown element?

• A)radon-222
• B)lead-214
• C)plutonium-238
• D)bismuth-214
• E)lead-218

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Definitions:

Masters And Johnson

Two pioneering researchers in sexual behavior and response, known for their work on human sexual response cycles and sexual disorders.

Sildenafil (Viagra)

A medication used primarily to treat erectile dysfunction and, under the name Revatio, pulmonary arterial hypertension by increasing blood flow to the penis.

Sexual Arousal

The physiological and psychological state of being awake or stimulated to sexual activity.

Multiple Orgasms

The experience of having more than one orgasm during a single sexual activity session.