If the atomic number of an element X is 11 and that of nitrogen is 7, the most likely formula of the nitride of X is?
A. X3N B. XN3 C. X3N2 D. N2X E. NX2 Correct Answer: Option A – X3N
In linear molecules, the bond angle is?
A. 90° B. 140° C. 109° D. 120° E. 180° Correct Answer: Option E – E. 180°
What is the most probable group of an element which is a soft, silvery white solid and reacts violently with water?
A. Group 0 B. Group 1 C. Group 4 D. Group 6 E. Group 7 Correct Answer: Option B – Group 1
Radon is used as a tracer in medical research because it?
A. is monatomic B. is radioactive C. is a noble gas D. has a complete valence shell E. has a low boiling point Correct Answer: Option B – is radioactiveProducts
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