An element, X, has two naturally occurring isotopes. 301x has a mass of 300.2 g/mol and is 31.60% abundant. 304x has a mass of 303.1 g/mol and is 68.40% abundant. What is the average atomic mass of X?

the answer is

one of the following is an electrolyte off simple cell 1sulphuric 2carbon 3Angy 4HD

since the atomic number is the number of protons in the nucleus, as we move to the left on the periodic table, the electrostatic pull between the nucleus and the valence electron shell decreases. as we move down a group (vertical column), the valence shell energy level gets further and further from the nucleus.

the answer is:  

line graphs show patterns in data with variables that change over time; whereas, circle graphs show data as parts out of a whole (such as out of 100%).