An arithmetic series is given by(k+1)+(2k+3)+(3k+5) +303 a)find the number of terms in the series in terms of k b)show that sum of the series is given by(152+46208)/k+2

The think of process to make something successful

So the main goal for the elements is stability which is a complete/full valence shell and typically the magic number for a stable element is 8 valence electron but not always. so elements to the left of the periodic table tend to be way less stable then those on the right, so the elements on the left are much more reactive.