ELEMENTS

Chemistry

ELEMENTS

Element Definition: A chemical element is a substance that cannot be broken down by chemical means. Elements are defined by the number of protons they possess. These are the first 20 elements, listed in order: 1 – H – Hydrogen 2 – He – Helium 3 – Li – Lithium 4 – Be – Beryllium

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Chemistry

ELEMENTS, SYMBOLS & VALENCY

ELEMENTS AND SYMBOLS An element is a substance which cannot be split into simpler units by ordinary chemical process. There are over one hundred known elements.   SYMBOLS OF ELEMENTS There are three ways in which symbols of elements are derived. From the first letter of the name of the element Element                        Symbols Hydrogen                                

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