: Cho biết số đơn vị điện tích hạt nhân, số proton, số notron và số electron của 40
20
Ca;
54
26
Fe

Describe the interaction that occurs between two objects with the same electrical charge.

Which statement correctly describes metallic bonds? a. they form when certain atoms lose electrons and other atoms gain electrons. b. they involve an attraction between anions and cations. they always involvpoth a metal and a nonmetal. d. they can only form between atoms of the same element. e. they form because electrons can move freely between atoms.

Aperfume bottle is dropped in the corner of a room. the odor of the perfume can be detected on the other side of the room. which statement best describes this observation?