Which of the following has smallest ionisation energy
H.
Li
Na
K

Ithink is a because if say increased in electronegativity

The activity series is shown in the attached picture. if the element is below the other, then you can displace the other. following the activity series as a guide, the reactions are as follows: nickel and aluminum chloride3 ni + 2 alcl₃  → 3 nicl₂ + 2 albarium and copper bromideba + cubr  →  no reaction because cu is less oxidizable than bapotassium nitrate and aluminum3 kno₃ + al  → al(no₃)₃ + 3 ksodium phosphate and zincnaso₄ + zn  → znso₄ + na

27. =3,500,000 x 4,000 = 14,000,000,000

Answer//the law of conservation of mass.;