What refers to a weighted average of the atomic weights of all naturally occurring isotopes of an element.

Atomic mass of an element refers to a weighted average of the atomic weights of all naturally occurring isotopes of an element.

The atomic mass of an element is the weighted average mass of the atoms of all naturally occurring isotopes of the element. Atomic mass is usually reported in atomic mass units and it can be calculated using the weights of the different isotopes and the relative abundances of the element's naturally occurring isotopes. The atomic mass of each element is usually indicated below the element's symbol in each square in the periodic table. For example, the atomic mass of the element boron is 10.8, while that of neon is 20.8.

the backbone of the dna and rna compound is sugar phosphate.

"menstrual cycle is a complex cycle that consists of several processes. order of occurrence of steps in menstrual cycle are as follows:

1. high progesterone levels maintain the endometrium lining of the uterus.

2. endometrium lining breaks down and low levels of estrogen stimulate the pituitary to release fsh and lh.

3. fsh and lh stimulates the follicles to develop and the oocyte to produce estrogen.

4. rising estrogen levels suppress fsh production and development of other follicles.

5. a spike in lh causes follicle to rupture.

6. a breakdown of corpus luteum causes progesterone level to drop."