Question

Explain the outline of the modern
periodic
table​

Answer 1

Answer:

modern periodic table is used to organize all the known elements. Elements are arranged in the table by increasing atomic number. Atomic numbers increase from left to right and from top to bottom in the table. Rows of the periodic table are called periods.

Answer 2

Answer:

In modern period table, the elements are arranged in the increasing order of atomic numbers.

Explanation:

• The atomic number of any element is equal to the number of protons in the nucleus. The number of protons in the nucleus is equal to the total number of electrons in the atom.

• In the modern periodic table, elements having same number of valence electrons are placed in vertical columns called groups.

• The vertical columns of elements in a periodic table are called groups.

• The horizontal rows of elements in a periodic table are called periods.

• The modern periodic table consists of 18 groups and 7 periods .

• Electronic configuration of elements in a period:

Periodic number indicate the value of 'n' or shell number 'n' is the number of the given shell starting from the nucleus.

• The maximum number of electrons that can be accommodated in any shell is 2n², where n is the number of the given shell.

• All the elements in any group of the periodic table have identical outershell electronic configuration.

• All the elements in a group have same number of electrons in their valence shell as well as they have similar properties.

HOPE THIS WILL BE HELPFUL TO YOU.