WILL MARK AS BRAINLIEST! Element X has two known naturally occurring isotopes. The mass and relative abundance of each isotope are
shown below.

Relative Abundance
50.57%
49.43%

Mass (amu)
78
81

What is the average atomic mass of Element X to the nearest hundredth of an atomic mass unit?

A. 79.04 amu
B. 79.48 amu
C. 79.48 amu
D. 80.48 amu

answer; i believe the correct answer is (solid gold);

i believe it is-

d.) gravity pulled particles of dust and gas together to form planets.

the atomic number will stay the same no matter how many electrons it has, so it doesn’t decrease nor increase. it’ll only change with a different number of protons

increased stability in the completion of fluorine's outer shell.