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.
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.
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 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.
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.
The rows of elements in the periodic table are called periods. There are a total of 7 periods in the periodic table, each representing a different energy level or shell in which the elements' electrons are arranged.
Elements on the modern periodic table are arranged in order of increasing atomic number, which represents the number of protons in the nucleus. This arrangement helps to group elements with similar properties in the same vertical column or group. The periodic table is divided into periods (rows) and groups (columns) based on these properties.
Groups or families; all are arranged by the number of valence electrons.
groups
7 periods and 18 groups are there on the modern periodic table.