43
If X is a group lll element, its oxide would be represented as
- A. X3O2
- B. X3O
- C. X2O3
- D. XO3
44
Which of the following statements about chlorine and iodine at room temperature is correct?
- A. Chlorine is gas and iodine is solid
- B. Chlorine is liquid and iodine is gas
- C. Chlorine and iodine are gases
- D. Chlorine is solid and iodine is liquid
45
Which of the following elements is a d-block element?
- A. Calcium
- B. lron
- C. Lithium
- D. Silicon
46
The energy change which accompanies the addition of an electron to a gaseous atom is
- A. atomization
- B. electron affinity
- C. electronegativity
- D. ionization
47
Which of the following equations represents beta decay?
- A. \(\frac{14}{7}\)N + \(\frac{4}{2}\)He → \(\frac{8}{17}\)O + \(\frac{1}{1}\)H
- B. \(\frac{8238}{92}\)U → \(\frac{234}{90}\)Th + \(\frac{4}{2}\)He
- C. \(\frac{8238}{92}\)U → \(\frac{239}{93}\)Np + \(\frac{0}{-1}\)e
- D. \(\frac{13}{7}\)N + \(\frac{4}{2}\)He → \(\frac{16}{8}\)O + \(\frac{1}{1}\)H