Advertisements
Advertisements
प्रश्न
Name or state following with reference to the elements of the first three periods of the periodic table.
A metalloid in period 2 and in period 3.
Advertisements
उत्तर
Metalloid in period 2 is B (Boron) and in period 3 is Si (Silicon)
APPEARS IN
संबंधित प्रश्न
Define the term : Atomic size
Rewrite the following statement after correction, if necessary:
Elements in the same period have equal valency
An element has 2 electrons in its N shell.
State the name assigned to this group.
Select the correct answer
Most reactive character among the elements given below is found in
The elements of one short period of the periodic table are given below in order from left to right:
Li Be B C O F Ne
(a) To which period do these elements belong?
(b) One element of this period is missing. Which is the missing element and where should it be placed?
(c) Place the three elements, fluorine, beryllium and nitrogen, in the order of increasing electro negativity.
(d) Which one of the above elements belongs to the halogen series?
Choose the correct answer from the choice given:
An element A belonging to Period 3 and Group II will have
With reference to the variation of properties in the Periodic table, which of the following is generally true?
An element belongs to the third period and Group IIIA (13) of the periodic table. State: the valency,
Write the electronic configuration of two elements A and B whose atomic numbers are 20 and 17 respectively. Write the molecular formula of the compound formed when element A reacts with element B. State whether this compound is acidic, basic or neutral. Give a reason to justify your answer.
Match the option A and B with the statements (i) and (ii):
| A. metal | (i) The metal that forms two types of ion. |
| B. iron | (ii) An element with electronic configuration 2, 8, 8, 3. |
