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10The modern periodic table is based on atomic number.
Henry Moseley discovered that properties depend on atomic number.
Isotopes have different numbers of protons.
The modern periodic table has 7 periods.
There are 18 groups in the modern periodic table.
Metals are placed on the right side of the periodic table.
Halogens are placed in group 17.
Noble gases are placed in group 18.
Lanthanides are placed in the main block of the periodic table.
Elements are arranged in decreasing order of atomic number.
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The modern periodic law was given by:
Modern periodic table is based on:
Number of periods in modern periodic table:
Number of groups in modern periodic table:
Isotopes differ in number of:
Halogens are placed in group:
Noble gases are placed in group:
Lanthanides start from:
Elements are classified into blocks based on:
Elements in the same period have the same number of:
The modern periodic law is based on ______ number.
The forms of the same element having different atomic weights are called ______.
The number of ______ remains constant in isotopes.
The modern periodic table has ______ periods.
The modern periodic table has ______ groups.
Metals are placed on the ______ side of the periodic table.
Halogens are kept in group ______.
Noble gases are placed in group ______.
The elements are arranged in increasing order of ______ number.
Elements are classified into s, p, d and ______ blocks.