Why IA group elements are called alkali metals and IIA group are called alkaline earth metal?? Thanks a lot .

Sodium $Na_11^23$ is so reactive that if sodium metal is placed in water it will react vigorously to produce Hydrogen gas and heat often causing an explosion. All of...

....$"al-quily"$ meaning the $"ashes, potash"$. And of course we commonly find the hydroxides of the alkali metals from extracting the ashes of a fire with water - hence $"potash"$, i.e....

It is well known that ionization energies INCREASE across a Period from left to right as we observe the Table, but decrease down a Group. Across the Period, as nuclear...

In the absence of actual data, I would guess that the ionization energy of alkaline earth, i.e. the energy associated with the given reaction: $"Alkaline Earth+energy"rarr"(Alkaline Earth)"^+ + e^-$ would...

As you know, metallic results from the delocalization of electrons from the parent metal atom so that positive ions are conceived to swim in a sea of electrons. This view...

As the outermost electrons are further from the positive nucleus there is less attraction between the negative electron(s) and the nucleus. As there is less attractive force it requires less...

With of , elements are arranged into Groups (columns) and rows (periods). Atoms decrease in size across a Period (from left to right as you're facing), but increase in size...

Ionic bonds occur between anions and cations. And cations may be metallic, i.e., $M^(2+)$, or they may be non-metallic, i.e. ammonium salts, $NH_4^+$. And anions, while typically non-metallic, i.e. $X^-$...

If the number to be rounded off were 0.0504, the rounded off version would obviously have been 0.050. This is because, of the two possibilities here, 0.050 is closer to...

In such a mass, there are $2xxN_A$ $"nitrogen atoms"$, and $8xxN_A$ $"hydrogen atoms"$, and $2xxN_A$ $"chromium atoms"$, and $7xxN_A$ $"oxygen atoms"$. Here we use $N_A$ as a counting...