Which one of the following is not a periodic property ?
Which one of the following is not a periodic property ? A. Melting point of elements B. Boiling point of elements C. Ionization energy of elementsD. Coordination number of ions
Which one of the following is not a periodic property ? A. Melting point of elements B. Boiling point of elements C. Ionization energy of elementsD. Coordination number of ions
In which of the following pairs are elements belonging to the same group ? A. Boron & BerylliumB. Nitrogen & Phosphorous C. Magnesium & Aluminium D. Gallium & Helium
Hydrogen resembles with carbon because of having________________? A. Same number of electrons in the valence shell B. Similar physical stateC. Remarkable reducing properties D. Homovalent (show same valency)
Amphoteric exides are those which possess ____________ properties? A. Acidic B. BasicC. Acidic and basic D. Neutral and acidic
Modern periodic table has been divided in ___________ blocks? A. 2B. 4 C. 8 D. 7
Seventh period contains _________________ normal elements ? A. 2 B. 4 C. 6 D. 8
The longest period in the modern periodic table is___________________? A. 6th B. 7th C. 2nd and 3rd both D. 5th
Noble gases are named so because they are__________________? A. less reactive B. Zero group elements C. Having completely filled valence shellD. All
Which element was not known when Mendeleev proposed his classification ? A. Hydrogen B. Sodium C. CopperD. Germanium
The scientist who did not contribute in the construction of periodic table ? A. Al-Razi B. Moseley C. DobereinerD. Democritus