Question

Write the number of periods and groups in the modern periodic table. How does the metallic character of Elementary vary on moving from left to right in a period and down a group?

Answer 1

Explanation:

There are 7 periods and 18 groups in the modern periodic table.

1. On moving from left to right in a periodic table, metallic character of elements decreases.

Metals have a tendency to lose electrons. In a period, atomic size decreases so it becomes difficult to remove the electrons of the outermost shell.

2. On moving from top to bottom in a periodic table, metallic character of element increases.

As we move down the group, atomic size increases so the electron of the outermost shell is easy to remove and hence metallic character of element increases.

Hope it helps.............

Answer 2

Answer:

PERIODS - 7 [HORIZONTAL ROWS]

GROUPS - 18 [VERTICAL COLUMNS]

Metallic character along the period decreases as loosing of electrons becomes difficult because of the reducing atomic size .

Metallic character along the group increases as the loosing of electrons becomes easier as the atomic size increases .

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