Advertisements
Advertisements
प्रश्न
Name and state the following with reference to the elements of the first three periods of the periodic table.
Alkaline earth metal in period 3.
Advertisements
उत्तर
Magnesium
APPEARS IN
संबंधित प्रश्न
Write the atomic numbers of two elements 'X' and 'Y' having electronic configuration 2, 8, 2 and 2, 8, 6 respectively.
Fill in the blank in the following statement:
The tendency to gain an electron ............... on moving down in a group of the periodic table.
In which part of a group would you separately expect the elements to have the greatest metallic character
The atomic number of an element is 20. In modern periodic table, this element is placed:
(a) 2nd period
(b) 4th period
(c) 3rd period
(d) 1st period
Which of the following element would lose an electron easily?
(a) Mg
(b) Na
(c) K
(d) Ca
An element X belong to 4th period and 17th group, state.
name of the element.
Name the non-metals present in period 2 and metals in period 3.
Select the correct answer
Number of shells in potassium are
Fill in the blanks from the words A to F given below’.
A: Decreases
B: Increases
C: Remains same
D: Increases by one
E: Electropositive
F: Electronegative
Across a period from left to right in the Modern Periodic Table.
No. of electron shells _________; No. of valence electrons __________: Electronegativity increases Character of elements changes from electropositive to ________.
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. |
