Question

list all the elements with their atomic number and atomic mass?​

Answer 1

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ⒶⓃⓈⓌⒺⓇPeriodic Table of Elements

The periodic table is the tabular arrangement of all the chemical elements on the basis of their respective atomic numbers. In the periodic table, the vertical columns are called ‘groups’ and the horizontal rows are called ‘periods’. 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 trends 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 a specific atomic number, which provides insight into the number of protons present within its nucleus. All isotopes of an element fall under a single cell on the periodic table, since they all share the same atomic number.

Periodic Table of Elements

Periodic Table of Elements – Atomic Number, Atomic Mass, Groups & Symbols

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Answer 2

Element name Element symbol Atomic number

Hydrogen H 1

Helium He 2

Lithium Li 3

Beryllium Be 4

Boron B 5

Carbon C 6

Nitrogen N 7

Oxygen O 8

Fluorine F 9

Neon Ne 10

Sodium Na 11

Magnesium Mg 12

Aluminium Al 13

Silicon Si 14

Phosphorus P 15

Sulfur S 16

Chlorine Cl 17

Argon Ar 18

Potassium K 19

Calcium Ca 20