What is the basis of a metallic bond?
a. the attraction of metal ions for mobile electrons
b. the attraction between neutral metal atoms
c. the neutralization of protons by electrons
d. the attraction of oppositely-charged ions

The attraction of metal ions for mobile electrons

The correct option is A. The attraction of metal ions for mobile electrons

Formation of metallic bond:

In metals , the valence shells electrons of s and p orbitals are mostly delocalized forming sea of electrons. These free electrons surround the positively charged atoms resulting formation of metallic bonding.

Aphysical change is one that you can put in and remove like a ham sandwich. the stuff you put in there can be changem its not permanet. a chemical change is on that can't be change thats permanet. like when you make a cake and bake it. you can't get those ingredients back.

B.) falsehope this !