An Isotope of a Given Element Has a Mass Number

question 6

Multiple Choice

An isotope of a given element has a mass number equal to twice the atomic number.  This neutral isotope contains twelve electrons.  This isotope is _____ .

• A)magnesium-12.
• B)magnesium-24.
• C)chromium-24.
• D)chromium-12.

---

Definitions:

Dyspareunia

Painful intercourse, either due to physical or psychological factors.

Amenorrhea

The absence of menstruation in a woman of reproductive age, which can be primary (never having menstruated) or secondary (cessation of menstruation for various reasons).

Hysterectomy

a surgical operation to remove all or part of the uterus.

Hysterotomy

A surgical procedure to access the uterus, often performed during a cesarean section.