The periodic law arranges the elements according to increasing atomic numbers and by lines depending on the number of electrons in the valence (outer) shell.
As acording to law atomic numbr is the periodic function for elements and chemically simslar elements reoccur at regular intervals so in case of a group their oxidation states are similar
When elements are arranged in order of increasing atomic number, the elements having same chemical properties appear together.
periods are arranged by atomic number
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Periodic table is arranged in rows and columns. there are 7 periods and 18 groups.
Periodic table comprises of elements. These are arranged in groups and periods.
Periodic table is arranged by atomic number. elements are arranged in groups and periods.
The periodic table has 7 periods and 18 groups. The order of elements is governed by the number of protons.
Groups or families; all are arranged by the number of valence electrons.
Elements are arranged on the Periodic Table in the order of the atomic number, in groups and periods.
by groups and periods
Periodic table is arranged in rows and columns. there are 7 periods and 18 groups.
Periodic table comprises of elements. These are arranged in groups and periods.
The elements are arranged in order of increasing atomic number in the Periodic Table. The rows are called periods and the columns are called groups.
Periodic table is arranged by atomic number. elements are arranged in groups and periods.
The periodic table of Mendeleev contain now 118 chemical elements arranged in groups and periods.
The periodic table has 7 periods and 18 groups. The order of elements is governed by the number of protons.
Groups in the periodic table are the vertical columns in which the elements are arranged.
Modern periodic table has 7 periods and 18 groups.
Groups or families; all are arranged by the number of valence electrons.
7 periods and 18 groups are there on the modern periodic table.