Elements that lose or donate electrons from their valence shell by forming cations are called metals. They are electropositive in nature.
Note: Any five of the mentioned examples of metals can be used to answer this question:
(i) Sodium (Na)
(ii) Magnesium (Mg)
(iii) Copper (Cu)
(iv) Silver (Ag)
(v) Gold (Au)
(vi) Potassium (K)
(vii) Calcium (Ca)
(viii) Aluminium (Al)
(ix) Iron (Fe)
(x) Zinc (Zn)
(xi) Lead (Pb)