Q19 of 31 Page 198

Name two elements that you would expect to have chemical properties similar to Mg. What is the basis for your choice?

As we know that the elements in a group generally possess similar properties.


Magnesium (Z=12) belongs to second group. So the two elements, calcium (Z=20) and beryllium (Z=4) have similar chemical properties like Mg because these elements also belong to second group.


More from this chapter

All 31 →
17

Why was the basis of classification of elements changed from the atomic mass to the atomic number?

 18

What is a periodic property? How do the following properties change in a group and period? Explain.

(a) Atomic radius


(b) Ionization energy


(c) Electron affinity


(d) Electro negativity.


(b) Explain the ionization energy order in the following sets of elements:


a) Na, Al, Cl b) Li, Be, B


c) C N, O d) F, Ne, Na c) Be, Mg, Ca

 20

On the basis of atomic number predict to which block the elements with atomic number 9, 37, 46 and 64 belongs to?

 21

Using the periodic table, predict the formula of compound formed between and element X of group 13 and another element Y of group 16.