Who Invented the Periodic Table?

Who Invented the Periodic Table? book cover — Who Invented the Periodic Table Nigel Saunders

Who Invented the Periodic Table? — page 1 — Chemical elements The periodic table The periodic table is a very useful invention for chemists the scientists who study the substances around us It is a chart containing all the known chemical elements It even has spaces for elements not yet discovered To understand the periodic table how it was invented and why it is needed by chemists it is important to know about atoms and elements Inside an atom Nucleus containing protons and neutrons Neutron Proton Electron Atoms Books birds buildings and all the other things around you are made from tiny things called atoms You are made from atoms too Atoms are so small that a million of the biggest ones would make a pile less than half a millimeter high We cannot see atoms even with a microscope It can be difﬁcult to believe that something invisible exists Just over a hundred years ago a few scientists still did not believe in atoms but the results of many experiments show that atoms are real Not only that they are made from even smaller things called subatomic particles Inside an atom There are three main types of subatomic particle Protons and neutrons are the heaviest They join together to make a 6 This is a diagram of a lithium atom Its nucleus is surrounded by three electrons and it contains three protons and four neutrons cluster in the middle of the atom called the nucleus Electrons are much lighter subatomic particles and clouds of them surround the nucleus THAT’S A FACT The nucleus of an atom is around 100,000 times smaller than the atom as a whole and most of an atom is empty space The name atom comes from the Greek word atomos meaning something that cannot be split

Who Invented the Periodic Table?

Who Invented the Periodic Table?

This series looks at some of the major inventions and discoveries that have helped to shape our world today.

About This Book

By: Nigel Saunders

Illustrated by:

Published by: Arcturus Publishing provided by Britannica

9-12Age Range

-AR

42Pages

ChemistrySubject

-Lexile

30-45 minsReading Time

-Guided Reading

-Fountas & Pinnell

-DRA

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