6 - Section 1000) 115
6.P.3A.1 Which of the following objects demonstrate mechanical energy?
(4 Points)
Hot cup of coffee
Burning coal
Ball rolling down a table
Incandescent light bulb
16

Ch4 and ph3 are both covalent since they are composed both of non-metals.    ch4 is non- polar because of  london forces and has a geometry of tetrahedral  ph3 , on the other hand, is umbrella shaped polar and has dipole-dipole intermolecular force (imf) . since ph3 is polar, it has a stronger imf   

In any atom of any element, you will find protons and neutrons in the nucleus of any atom 

The answer is c. risk