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प्रश्न
The modern periodic table has 1 to 7 periods.
पर्याय
Right
Wrong
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उत्तर
The modern periodic table has 1 to 7 periods- Right
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संबंधित प्रश्न
Fill in the blank:
The modern periodic table consists of ……………. periods.
In the Modern Periodic Table, which are the metals among the first ten elements?
Why do all the elements of the same group have similar properties?
Fill in the following blank with suitable word:
The basis for modern periodic table is ...............
What is meant by a period, in a periodic table?
How many periods and groups are there in the long form of periodic table?
How were the positions of isotopes of an element decided in the modern periodic table?
How were the positions of cobalt and nickel resolved in the modern periodic table?
The atomic numbers of four elements P, Q, R and S are 6, 8, 14 and 16 respectively. Out of these, the element known as metalloid is:
(a) P
(b) Q
(c) R
(d) S
The atomic particle whose number in the atoms of an element always remains the same and which forms the real basis for the modern classification of elements is:
(a) electron
(b) proton
(c) neutron
(d) meson
Which element has two shells, both of which are completely filled with electrons?
Give alongside is a part of the periodic table :
As we move horizontally from left to right:
| Li | Be | B | C | N | O | F | |
| Na | Mg | Al | Si | P | S | Cl |
(i) What happens to the metallic character of the elements?
(ii) What happens to the atomic size?
What are the advantages of the periodic table?
State the term
The tabular arrangement of elements in horizontal rows and vertical columns _________
Name the scientist who stated the modern periodic law.
What are horizontal rows and vertical columns in a periodic table known as?
Name two elements in Alkali metals.
Name two elements in Alkaline earth metals.
Name two elements in each case: Lanthanides
Name the type of elements which have two electrons in the outermost orbit.
Answer the following in respect of element `31/15 P`
Give its electronic configuration
State the modern periodic law.
In the Modern Periodic Table – atoms of all elements are arranged according to their increasing order of – atomic numbers. An atom of nitrogen has seven protons and seven electrons. State what would be its atomic number.
Give the symbol and valency of the following element and radical.
Hydrogen
Give the symbol and valency of the following element and radical.
Magnesium
Give the symbol and valency of the following element and radical.
Sulphite
State what is meant by the term chemical formula.
Give the chemical formula of magnesium nitrate
The groups 1 and 2 constitute the _______ block.
The modern periodic table is divided into which blocks?
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.
Elements in the modern periodic table are arranged in ______groups and______ periods.
______ and ______ are called inner transition elements.
The arrangement of elements in the Modem Periodic Table is based on their ______
Element ‘X’ forms a chloride with the formula XCl2, which is solid with a high melting point. X would most likely be in the same group of the periodic table as: ______
The elements A, B, C, D and E have atomic number 9, 11, 17, 12 and 13 respectively. Which pair of elements belong to the same group?
An element belonging to 3d series of modern periodic table has spin magnetic moment = 5.92 B.M. in +3 oxidation state. The atomic number of elements are ______.
Define periods of modern periodic table.
An element ‘M' has 50% of the electrons filled in the 3rd shell as in the 2nd shell. The atomic number of ‘M’ is ______.
