Atomic Structure and Periodic Table
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Atomic Structure and Periodic Table

A teaching resource provided by Peter Koech.

Resource Description

Introduction
• The particles constituting an atom are the electron, the proton, and the neutron.
• An atom is composed of two regions: the nucleus, which is in the center of the atom and contains protons and neutrons, and the outer region of the atom, which holds its electrons in orbit around the nucleus.
• Protons and neutrons have approximately the same mass, about 1.67 × 10-24 grams, which scientists define as one atomic mass unit (amu) or one Dalton.
• Each electron has a negative charge (-1) equal to the positive charge of a proton (+1).
• Neutrons are uncharged particles found within the nucleus.
• The periodic table is a table that logically organize all the known elements.
• Each row is named “period” where all of the elements have the same number of atomic orbitals.
• Each column is called “group” where the elements have the same number of electrons in the outer orbital.

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File Name File Type File Size
Atomic Structure and Periodic Table.docx
Microsoft Word 17KB

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