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प्रश्न
Distinguish between:
s-block - p-block
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उत्तर
| s-block | p-block | |
| 1. | The s-block contains groups 1 and 2. | The p-block contains groups 13 to 18. |
| 2. | All the elements of s-block are metals. | p-Block elements include metals, nonmetals and metalloids. |
| 3. | s-block elements are placed to the extreme left side in the modern periodic table. | p-block elements are placed to the extreme right side in the modern periodic table. |
| 4. | There is no zig-zag line to separate different types of elements in the s-block of the periodic table. | A zig-zag line can be drawn to separate different types of elements (metals, metalloids and nonmetals) in the p-block of the periodic table. |
संबंधित प्रश्न
What is periodicity in properties of elements with reference to the Modern Periodic Table?
Fill in the following blank with suitable word:
The horizontal rows in a periodic table are called ...............
What is meant by a period, in a periodic table?
How were the positions of cobalt and nickel resolved in the modern periodic table?
On which side of the periodic table will you find metals?
Consider the following elements:
Na, Ca, Al, K, Mg, Li
Which of these elements belong to the same group of the periodic table?
Which element has the electronic configuration 2, 8, 2?
What is the fundamental difference in the electron configurations between the group 1 and group 2 elements?
On the basis of electronic configuration, how will you identify chemically similar elements?
Explain why, the first period of the periodic table has only two elements whereas second period has eight elements
(b) What is the number of elements is 3rd period, the modern periodic table?
In what respects do the properties of group 1 elements differ from those of group 17 elements? Explain with examples by taking one element from each group.
The following diagram shows a part of the periodic table in which the elements are arranged according to their atomic numbers. (The letters given here not the chemical symbols of the elements):
| a 3 |
b 4 |
c 5 |
d 6 |
e 7 |
f 8 |
g 9 |
h 10 |
|
| i 11 |
j 12 |
k 13 |
l 14 |
m 15 |
n 16 |
o 17 |
p 18 |
(i) Which element has a bigger atom, a or f?
(ii) Which element has a higher valency, k or o?
(iii) Which element is more metallic i or k?
(iv) Which element is more non-metallic, d or g?
(v) Select a latter which represents a metal of valency 2.
(vi) Select a letter which represents a non-metal of valency 2.
An element X belongs to 3rd period and group 2 of the periodic table. State:
(a) number of valence electrons
(b) valency
(c) metal or non-metal
(d) name of the element
Name the type of elements which have outermost shell incomplete.
Arrange the elements of second and third periods in increasing order of their atomic size.
Third Period.
Fill in the blank:
The horizontal rows in the periodic table are called _____________.
What would be the correct order if Zn, Fe, Al and Cu are arranged in increasing order of reactivity?
How does number of (i) valence electrons (ii) valency; vary on moving from left to right in the second period of a periodic table?
The horizontal rows in a periodic table are called _____.
Two elements P and Q belong to the same period of the modern periodic table and are in group 1 and group 2, respectively. Compare the following characteristics in the tabular form.
- Number of electrons in their atoms
- Their tendency to lose electrons
- Their metallic characters
- Formation of their oxides
- Formulae of their chlorides
Give the symbol and valency of the following element and radical.
Nitrogen [Nitride]
Give the symbol and valency of the following element and radical.
Ammonium
Give the chemical formula of magnesium nitrate
Give the chemical formula of calcium phosphate
Which of the following statements about the Modern periodic table is correct?
Mendeleev's periodic table : atomic mass : : Modern periodic table : _______
To the left of the zig-zag line in the periodic table are the metal elements.
Which of these belong to the same period?
| Element | A | B | C |
| Atomic number | 2 | 10 | 5 |
The element with atomic number 14 is hard and forms acidic oxide and a covalent halide. To which of the following categories does the element belong?
If an element X is placed in group 14, what will be the formula and the nature of bonding of its chloride?
Group 16 elements are collectively called as ______.
A part of modern periodic table is given below. On its basis, answer the following questions:
| Group No. → | 1 | 2 | 13 | 14 | 15 | 16 | 17 | 18 |
| Period ↓ | ||||||||
| 2 | A | B | ||||||
| 3 | E | D | F | C |
Which of the element is a Metalloid?
An element ‘M' has 50% of the electrons filled in the 3rd shell as in the 2nd shell. The atomic number of ‘M’ is ______.
1H2 is an isotope of hydrogen. In the modern Periodic Table it will ______.
Name two elements that you would expect to show chemical reactions similar to calcium. What is the basis of your choice?
An element has 2 electrons in its N shell.
State its position in periodic table.
