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प्रश्न
To the left of the zig-zag line in the periodic table are the metal elements.
विकल्प
Right
Wrong
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उत्तर
To the left of the zig-zag line in the periodic table are the metal elements- Right
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संबंधित प्रश्न
Fill in the blank:
The modern periodic table consists of ……………. periods.
Name two elements you would expect to show chemical reactions similar to magnesium. What is the basis for your choice?
In the Modern Periodic Table, calcium (atomic number 20) is surrounded by elements with atomic numbers 12, 19, 21, and 38. Which of these have physical and chemical properties resembling calcium?
Compare and contrast the arrangement of elements in Mendeleev’s periodic Table and the Modern Periodic Table.
What is periodicity in properties of elements with reference to the Modern Periodic Table?
What is meant by a group, in a periodic table?
Give two example of group 18 elements.
Name the scientist who prepared modern periodic table.
What is the major characteristic of the first elements in the periods of the periodic table? What is the general name of such elements?
Explain why, the first period of the periodic table has only two elements whereas second period has eight elements
What is the main characteristic of the last elements in the periods of the periodic table? What is the general name of such elements?
In the modern Periodic Table, why does cobalt with higher atomic mass of 58.93 appear before nickel having lower atomic mass of 58.71?
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 elements A, B, C and D belong to groups 1, 2, 14 and 17 respectively of the periodic table. Which of the following pairs of elements would produce a covalent bond?
(i) A and D
(ii) C and D
(iii) A and B
(iv) B and C
(v) A and C
Name the scientist who stated the modern periodic law.
Name two elements in Alkaline earth metals.
Name two elements in each case:
Transition element
Name the type of elements which have outermost shell incomplete.
Name the type of elements which have two electrons in the outermost orbit.
Write the number of protons, neutrons and electronic configuration of \[\ce{_19^39K, _15^31P}\]. Also state their position in periodic table.
State the main aim of classifying elements. Which is the more fundamental property of elements that is used in the development of Modern Periodic Table? Name and state the law based on this fundamental property. On which side of the periodic table one can find metals, non-metals and metalloids?
An element E has following electronic configuration:
|
K |
L |
M |
|
2 |
8 |
6 |
(a) To which group of the periodic table does element E belong?
(b) To which period of the periodic table does element E belong?
(c) State the number of valence electrons present in element E.
(d) State the valency of the element E.
What is the number of elements in the 1st period?
The horizontal rows in a periodic table are called _____.
Define the atomic size.
Give the symbol and valency of the following element and radical.
Aluminium
Give the chemical formula of carbonic acid
What are the elements.
The modern periodic table is divided into which blocks?
Complete the following flow chart.
What are groups and periods in the modern periodic table?
Which of the following is the outermost shell for elements of period 2?
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?
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.
Explain the position of hydrogen in the periodic table.
Define groups of modern periodic table.
State the group and period, of the element having three shells with three electrons in valence shell.
An element has 2 electrons in its N shell.
Is it a metal or a non-metal?
