Q.III. Choose the correct answer:
1. Which of these elements have the third highest ionization energy?
a) 1sĀ²2sĀ²2pā¶3s1
b) 1sĀ²2sĀ²2pā¶3sĀ²3pĀ¹
c) 1sĀ²2sĀ²2pā¶3sĀ²
d) 1sĀ²2sĀ²2pā¶3sĀ²3pāµ
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
