An atom of which of the following has the least ability to attract electrons? A. Silicon
B. Oxygen
C. Nitrogen
D. Bromine

May someone me with these science questions

How can the periodic table be used to predict the behavior of elements?

4. propanol and isopropanol are isomers. this means that they have a) the same molecular formula but different chemical properties. b) different molecular formulas but the same chemical properties. c) the same molecular formula and the same chemical properties. d) the same molecular formula but represent different states of the compound