Which of the following elements can form compounds with an expanded octet? Which of the following elements can form compounds with an expanded octet? Na C Br H None of the above elements can form compounds with an expanded octet.

When balancing a chemical equation:

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

Energy defines the different "states" of matter. in no more than 3 sentences, describe the amount of kinetic energy that each of the 3 states of matter possesses and relate that to the atom/molecular motion of each "state".