The weak type of bonding which attracts molecules to molecules is: a. ionic b. hydrogen c. covalent d. nuclear

Which of the following did jj thompson discover about atoms? a)an atom has an internal structure. b) atoms are tiny indivisible particles. c)electrons orbit the nucleus of an atom. d) the nucleus of an atom contains protons and neutrons.

Drug abuse will not lead to physical and psychological dependence. true or false ?

What substance has a mass of 9.5g and volume of 2.1cm^3