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प्रश्न
The d-block elements are called as _______ elements.
विकल्प
transition
metalloid
normal
inner transition
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उत्तर
The d-block elements are called as transition elements.
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संबंधित प्रश्न
Why do all the elements of the same group have similar properties?
Name the scientist who first of all showed that atomic number of an element is a more fundamental property than its atomic mass.
How many periods and groups are there in the long form of periodic table?
Which element has the electronic configuration 2, 8, 2?
What is the number of valence electrons in the atoms of first elements in a period?
What is the usual number of valence electrons and valency of group 18 elements of the periodic table?
What are the merits of the modern periodic table of elements?
Which of the following are the correct characteristics of isotopes of an element?
(i) same atomic mass
(ii) same atomic number
(iii) same physical properties
(iv) same chemical properties
(a) (i), (ii) and (iv)
(b) (ii), (iii) and (iv)
(c) (ii) and (iii)
(d) (ii) and (iv)
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.
Define:
Periodic table
How many groups and periods does the modern periodic table have?
Name two elements in Alkaline earth metals.
Name two elements in each case: Lanthanides
Answer the following in respect of element `31/15 P `
To which group and period does it belong?
Write the number of protons, neutrons and electronic configuration of \[\ce{_19^39K, _15^31P}\]. Also state their position in periodic table.
Name an alkali metal in period 3 and halogen in period 2.
Name the noble gas with 3 shells.
How will the tendency to gain electrons change as we go from left to right across a period? Why?
Name an element of group 18 which can form compounds.
Give the symbol and valency of the following element and radical.
Sulphur [Sulphide]
Give the symbol and valency of the following element and radical.
Nitrogen [Nitride]
Give the symbol and valency of the following element and radical.
Bicarbonate
Give the symbol and valency of the following element and radical.
Sulphite
Find the odd one out and give its explanation.
p-block is composed of groups 1 and 2.
To the left of the zig-zag line in the periodic table are the metal elements.
In the modern periodic table, the positions of 1 to 20 elements are shown here. Identify the elements A and B. Write their atomic number.
Explain structure of modern periodic table in short.
What are groups and periods in the modern periodic table?
______ is the longest period in the periodical table.
______ forms the basis of the modern periodic table.
Which of the given elements A, B, C, D and E with atomic number 2, 3, 7, 10 and 30 respectively belong to the same period?
Where would you locate the element with electronic configuration 2,8 in the Modern Periodic Table?
Which of the following elements would lose an electron easily?
An element X which is a yellow solid at room temperature shows catenation and allotropy. X forms two oxides which are also formed during the thermal decomposition of ferrous sulphate crystals and are the major air pollutants.
- Identify the element X
- Write the electronic configuration of X
- Write the balanced chemical equation for the thermal decomposition of ferrous sulphate crystals?
- What would be the nature (acidic/ basic) of oxides formed?
- Locate the position of the element in the Modern Periodic Table.
Choose an element from period 3 of modern periodic table that matches the description given below in instance. Give a reason for your choice.
It has same valency as Lithium.
Explain the position of hydrogen in the periodic table.
- Write the electronic configuration of element X, given by its symbol as under: \[\ce{^40_20 X}\]
- Determine its position in the modem periodic table.
- What is the nature of its oxide?
- Name one other element of its group.
