Q.III. Choose the correct answer:
1. Which of these elements have the third highest ionization energy?
a) 1s²2s²2p⁶3s1
b) 1s²2s²2p⁶3s²3p¹
c) 1s²2s²2p⁶3s²
d) 1s²2s²2p⁶3s²3p⁵
2. ________________ is the ability to be pulled into thin sheets without breaking.
a) reactivity
b) corrosion
c) malleability
d) ductility
3. Which of the following has the least ionization energy?
a) Ga
b) Fe
c) K
d) Cs
4. Which one of the following has the smallest atomic size?
a) Cl
b) Si
c) Sn
d) Sr