In mordern periodic table there are all element given in modern periodic table
Look at the letters, 3 would be MMeters
12 moles are in the 175L of SO2 gas at STP
Chlorine would become a liquid. Its boiling point is around -34 Celsius so at any temperature below that it would be liquid.
In the physical properties, it is mentioned that the element has 4 valence electrons. The elements in the periodic table are arranged such that, the number of valence electrons present in the neutral atoms belonging to a particular group is equal to the group number.
Thus, the unidentified element can be best classified as a nonmetal in period 4
Ans C)
