Which atom goes in the center and why? Oxygen, less lonely e- and more electronegative. Oxygen, more lonely e- and less electronegative. Silicon, more lonely e- and less electronegative. Silicon, less lonely e- and more electronegative.

Iknow #2 is d. i just need to know why

He table below gives the atomic mass and relative abundance values for the three isotopes of element m. relative abundance (%) atomic mass (amu) 78.99 23.9850 10.00 24.9858 11.01 25.9826 what is the average atomic mass (in amu) of element m? 2.86 5.36 24.30 24.98

How do dying stars contribute to the formation of planets