Two elements, X and Y are in the same group on the period...
Two elements, X and Y are in the same group on the periodic table because they both have the same
number of electronic shells
number of valence electrons
atomic size
atomic number
Correct answer is B
The members of the same group always have the same number of electrons in the outer shell (i.e number of valence electrons).
The electronic configuration of an element is 1S2 2S2 2P6 3S2&nbs...
Which of the following equations represents a redox reaction? ...
What is the concentration of a solution containing 2g of NaOH in 100cm3 of solution? [Na = 23, ...
In the diagram above, the gas produced is? ...
The Arrhenius equation expresses the relationship between the speed of a reaction and its ...
The fraction of crude oil used as jet fuel is? ...
The formula (CH3),3 COH is that of a...
When ethanol is heated with excess concentrated sulphuric acid, the ethanol is? ...