The atomic masses of three elements X, Y and Z having similar chemical

1.	The atomic masses of three elements X, Y and Z having similar chemical properties are 7, 23 and 39 respectively. (a) Calculate the average atomic mass of elements X and Z. (b) How does the average atomic mass of elements X and Z compare with the atomic mass of element Y? (c) Which law of classification of elements is illustrated by this example? (d) What could the elements X, Y and Z be? (e) Give another example of a set of elements which can be classified according to this law.
Answer» The atomic masses of three elements X, Y and Z having similar chemical properties are 7, 23 and 39 respectively. (a) Calculate the average atomic mass of elements X and Z. (b) How does the average atomic mass of elements X and Z compare with the atomic mass of element Y? (c) Which law of classification of elements is illustrated by this example? (d) What could the elements X, Y and Z be? (e) Give another example of a set of elements which can be classified according to this law.

The atomic masses of three elements X, Y and Z having similar chemical properties are 7, 23 and 39 respectively. (a) Calculate the average atomic mass of elements X and Z. (b) How does the average atomic mass of elements X and Z compare with the atomic mass of element Y? (c) Which law of classification of elements is illustrated by this example? (d) What could the elements X, Y and Z be? (e) Give another example of a set of elements which can be classified according to this law.

Answer»

The atomic masses of three elements X, Y and Z having similar chemical properties are 7, 23 and 39 respectively.

(a) Calculate the average atomic mass of elements X and Z.

(b) How does the average atomic mass of elements X and Z compare with the atomic mass of element Y?

(d) What could the elements X, Y and Z be?

(e) Give another example of a set of elements which can be classified according to this law.