Question

Atomic numbers of two elements A and B are 11 and 12 respectively. What is the key to displaying the most metallic properties of these? Write the protocols of compounds that occur when these elements behave with the element 'Z' with atomic number 8.​

Answer 1

A is sodium , B is magnesium .

sodium is weak, highly reactive , lustrous , valency:2 +

whereas magnesium is strong , less reactive than sodium , lustrous , valency : 2+

Z is oxygen

when sodium react with oxygen it forms sodium oxide

2Na + O2--> Na2O

when magnesium reacts with Mg it forms magnesium oxide

Mg+O2--> MgO