Explanation
Oscillation of loose electrons.
Low ionization energies.
Within a group, ionic radius increases with increase in atomic number.
Because of larger size and smaller nuclear charge, alkali metals have low ionization potential relative to alkaline earth metals.
For anion to cation ratio to be low, the anion must be small and cation must be large, i.e. Cs+ F-.
Higher the solubility, higher is the solubility product. Thus, CsOH being more soluble has the highest solubility product.
Washing soda is Na2CO3.10H2O.
CaCl2 and MgCl2 are deliquescent salts and absorb moisture from air to impart hygroscopic nature to crude common salt.
Only Li reacts with nitrogen directly to form Li3N.
Li, Na, K, Rb, Cs, Fr.
Lime stone (CaCO3) is used for producing CO2 gas.
Atomic size of K+ > Ca2+ > Mg2+ and that of Cl– > F–. Therefore, Mg2+/Cl– ratio has the minimum value.
Na–. Anions have larger size than the cations and parent atoms.
With the same anion, smaller the size of the cation, higher is the lattice energy, i.e. NaF.
According to Fajan rules, ionic character increases with increase in size of the cation and decrease in size of the anion. Thus, CsF has higher ionic character than NaCl and hence bond in CsF is stronger than in NaCl.
Mixture of K2CO3 and Na2CO3 is called fusion mixture.
All alkali metals are strong bases and hence Na cannot be amphoteric in nature.
Rb being most electropositive has the highest reactivity towards water.
The mixture of 40% NaCl and 60% CaCl2 has a lower m.p. than NaCl.
In NaCl (rock salt) structure, Cl- ions form fcc type of lattice.
Li due to highest hydration energy among the alkali metals is a strongest reducing agent.
Mg belongs to group 2. Therefore, its size is less than that of Na.
Na2O2 and HCl mixture is called oxone.
K2O + H2O → 2KOH
Sodium in excess of oxygen forms Na2O2.
4KO2 + 2CO2 → 2K2CO3 + 3O2
Alkali metals always show monovalency in their compounds.
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