2. Consider molecules of carbon disulfide, Cs,, and hydrogen cyanide, HCN a What types of bonds do they contain?
b Draw their electron-dot formulas.
c Are there any lone-pair electrons in these molecules?​

☆ionisation energy increases across a period from na -> ar☆ionisation energy decreases down a group from li -> fr☆ionic radius decreases across a period from na -> cl☆ionic radius increases down a groupfrom f -> ii hope it clarifies your doubts