S-block consists of metals ( alkali metals and Alkaline Earth metals ) , the metals form oxides which are basic in enough. This means when the oxides of the metals are made to react with water they form bases. For example Sodium is an s-block , when sodium oxide is made to react with water,Continue reading “How nature of oxides formed by s and p-block elements vary across a period .”
Tag Archives: s and p elements
Diagonal relationship
Is the similarities in properties ( chemical and physical ) observed between two elements placed diagonally from left to right in two adjacent groups in the periodic table of elements. The diagonal relationship is due to the polarizing power, i.e , ionic charge/radius being similar for diagonally placed elements. E.g lithium and Magnesium, Beryllium andContinue reading “Diagonal relationship”
Sodium is harder than potassium metal . Explain?
The smaller the atom in term of atomic radius,the higher the melting point of an element and hence the greater the metallic bond in the metals . Sodium has a smaller atomic radius ( atomic radius of the Alkali metals increases down the group) than potassium metal, therefore the orbital are nearer to the nucleusContinue reading “Sodium is harder than potassium metal . Explain?”
Ist and 2nd electron affinity of oxygen atom
1st electron affinity is usually exothermic as the energy released when the nucleus attracts additional electron is larger than the energy absorbed to overcome inter-electronic repulsion. 2nd electron affinity is always endothermic since an additional electron is added to a negative ion . Energy is absorbed to overcome inter-electronic repulsion between two negatively charged speciesContinue reading “Ist and 2nd electron affinity of oxygen atom”
Atomic size down group 13 elements.
The elements in group 13 ( p-block) have smaller atomic radius compared to the s block elements . However, the trend in atomic radius do not vary in a regular manner down the group. The atomic radius of Ga (135 pm) is slightly less than that of Al ( 143 pm) . This is becauseContinue reading “Atomic size down group 13 elements.”
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