Question

Symbols of first 50 elements

Answer 1

Answer:

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Answer 2

• The periodic table is the tabular arrangement of all the chemical elements based on their respective atomic numbers.
• In the periodic table, the horizontal rows are called ‘periods’ and the vertical columns are called ‘groups’.
• The modern periodic table is based on the modern periodic law put forward by the English physicist Henry Moseley, which states that “the properties of elements are periodic functions of their atomic numbers”.
• Periodic characteristics in the properties of the elements can be observed down the groups and across the periods of the modern periodic table.
• Every chemical element has an atomic number, which gives insight into the number of protons present within its nucleus.
• All isotopes of an element assign under a single cell on the periodic table, since they all share the same atomic number.

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