Answer:
Metals react by donating the electrons in their outermost shells to form +ve ions. Group 1, 2, and 3 metals donate1, 2, and 3 electrons respectively to form +1, +2, and +3 ions. The electrons in the outermost shells are kept at bay due to the attraction from the +vely charged nucleus. And energy is required to expel the outermost elrctrons.
Step-by-step explanation: