Which information would best fill the blanks in row 3?

metallic bond and low melting point

metallic bond and high melting point

covalent bond and low melting point

covalent bond and high melting point

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   

Well you can immediately rule out a and d because if a metal were to lose or gain protons, then it would become a different element all together. the answer here is b because the positive symbol with a number refers to how many electrons the metal can give away to become stable.

1small intestine- digestive system2 blood vessels- cardiovascular system3 lungs- respiratory system4 triceps- muscular system5 spine- skeletal systemhoped i can i get brainliest