Solution - Position of Elements and Trends in the Modern Periodic Table



      Forgot password?

View all notifications
Books Shortlist
Your shortlist is empty
ConceptPosition of Elements and Trends in the Modern Periodic Table  


Given below are some elements of the modern periodic table. Atomic number of the element is given in parentheses.

A(4), B(9), C(14), D(19), E(20)

(a) Select the element that has one electron in the outermost shell. Also, write the electronic configuration of this element.

(b) Which two elements amongst these belong to the same group? Give reasons for your answer.

(c) Which two elements amongst these belong to the same period? Which one of the two has bigger atomic radius?


You need to to view the solution
Is there an error in this question or solution?

Similar questions VIEW ALL

Two elements ‘A’ and ‘B’ belong to the 3rd period of Modern periodic table and are in group 2 and 13, respectively. Compare their following characteristics in tabular form:-

(a) Number of electrons in their atoms

(b) Size of their atoms

(c) Their tendencies to lose electrons

(d) The formula of their oxides

(e) Their metallic character

(f) The formula of their chlorides

view solution

From the following elements :

4Be; 9F; 19K; 20Ca

(i) Select the element having one electron is the outermost shell.

(ii) two elements of the same group.

Write the formula of and mention the nature of the compound formed by the union of 19K and element X(2, 8, 7).

view solution

Name any two elements of group one and write their electronic configurations. What similarity do you observe in their electronic configurations? Write the formula of oxide of any of the aforesaid elements.

view solution

Write the number of horizontal rows in the modern periodic table. What are these rows called?

view solution

The elements 4Be, 12Mg and 20Ca, each having two valence electrons in their valence shells, are in periods 2, 3 and 4 respectively of the modern periodic table. Answer the following questions associated with these elements, giving reason in each case:

(a) In which group should they be?

(b) Which one of them is least reactive?

(c) Which one of them has the largest atomic size?

view solution
Solution for concept: Position of Elements and Trends in the Modern Periodic Table. For the course 8th-10th CBSE