MEDIUM
10th CBSE
IMPORTANT
Earn 100
Explain the following: Beryllium oxide is amphoteric while magnesium oxide is basic.
Important Questions on Periodic Classification of Elements
MEDIUM
10th CBSE
IMPORTANT
Explain the following: Carbon is a non-metal while silicon is a metalloid.
EASY
10th CBSE
IMPORTANT
Why do not elements present in a period show similar characteristic?
HARD
10th CBSE
IMPORTANT
The elements 3 to 10 belong to the second period. Answer the following questions relating to their periodic trends.
(i) The most electronegative element.
(ii) The element belonging to group 18.
(iii) The element which forms the largest number of organic compounds.
(iv) The element which shows a valency of
(v) The element which shows a valency of .
HARD
10th CBSE
IMPORTANT
| Group of Numbers | 1 | 2 | 13 | 14 | 15 | 16 | 17 | 18 |
|---|---|---|---|---|---|---|---|---|
| D | O | J | ||||||
| A | E | H | K | |||||
| B | C | F | G | L |
Some elements are given above in their own symbol and position in the periodic table while others are shown with a letter. With reference to the table:
(i) Which is the most electronegative?
(ii) How many valence electrons are present in G?
(iii) Write the formula of the compound between B and H.
(iv) In the compound between F and J. What type of bond will be formed?
(v) Draw the electron dot structure for the compound formed between C and K.
HARD
10th CBSE
IMPORTANT
The following table shows the position of six elements A, B, C, D, E and F in the periodic table.
| Group/Periods | 1 | 2 | 3 to 12 | 13 | 14 | 15 | 16 | 17 | 18 |
|---|---|---|---|---|---|---|---|---|---|
| 2 | A | B | C | ||||||
| 3 | D | E | F |
Using the above table, answer the following questions:
(i) Which element will be from only covalent compounds?
(ii) Which element is a metal with valency 2?
(iii) Which element is a non-metal with valency 3?
(iv) Out of D and E, which one has a bigger atomic radius and why?
(v) Write the common names for the families of elements, C and F.
