A Neutral Atom of Phosphorus Was Found to Have an Atomic

question 2

Multiple Choice

A neutral atom of phosphorus was found to have an atomic number of 15 and a mass number of 31.What is the total number of electrons in this atom?

• A)16
• B)15
• C)31
• D)8
• E)46

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Definitions:

Neurons

are the basic working units of the brain, specialized cells that transmit information to other nerve cells, muscle, or gland cells.

Sex Hormones

Hormones that regulate the development and functioning of reproductive organs and that stimulate the development of male and female sexual characteristics; they include androgens, estrogens, and progesterone.

Estrogen

Estrogen is a primary female sex hormone responsible for the development and regulation of the female reproductive system and secondary sex characteristics.

Progesterone

A steroid hormone released by the corpus luteum that stimulates the uterus to prepare for pregnancy.