When an atom transfers/ gains a valence electron, it gains either a positive or negative charge. in the Proces, becoming an ion. because of the negative/positive charge the two ions are now attracted to each other.
Answer : states of mmmatter... This is because elements at the right are majorly non metal and are liquid or gas at room temperature while those at the left are metal and mostly solid at room temperature
Chordates, or members of phylum Chordata, possess a backbone.
