Bằng phương pháp hóa học hãy nhận biết các hóa chất nào mất nhãn sau: KNO3, Ba(OH)2, HCl

false

because it does not have the potential to be entirely used up

since the atomic number is the number of protons in the nucleus, as we move to the left on the periodic table, the electrostatic pull between the nucleus and the valence electron shell decreases. as we move down a group (vertical column), the valence shell energy level gets further and further from the nucleus.