Science Single Award - 4SS0 PearsonEdexcel

Atomic Structure

Muhtasari

Everything you can touch, taste, or breathe is made from atoms. Although atoms are far too small to see with the naked eye, understanding their internal structure explains why elements behave the way they do, why the Periodic Table is arranged the way it is, and how chemical reactions happen.

In this lesson you will learn what atoms and molecules are, explore the sub-atomic particles inside every atom, and discover how atomic number and mass number define an element. You will also meet isotopes and learn how to calculate relative atomic mass from isotopic abundances.

Malengo

Know what is meant by the terms atom and molecule
Know the structure of an atom in terms of the positions, relative masses and relative charges of sub-atomic particles
Know what is meant by the terms atomic number, mass number, isotopes and relative atomic mass (Ar)
Be able to calculate the relative atomic mass of an element (Ar) from isotopic abundances

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Maelezo ya Somo

A single grain of sand contains roughly 50 billion billion atoms. Each one has an internal structure that determines how the atom bonds, reacts, and behaves. Once you understand what is inside an atom, most of chemistry clicks into place.

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Which sub-atomic particle has a relative charge of -1? A) Proton B) Neutron C) Electron D) Nucleus Answer: C
The atomic number of an element tells you the number of: A) Neutrons B) Protons C) Electrons in the outer shell D) Protons and neutrons Answer: B
Two isotopes of the same element have the same: A) Mass number B) Number of neutrons C) Atomic number D) Relative atomic mass Answer: C
What is the electron configuration of magnesium (atomic number 12)? A) 2, 8, 1 B) 2, 4, 6 C) 2, 8, 2 D) 8, 4 Answer: C
The relative atomic mass of an element is 35.5. This means: A) Each atom has a mass of 35.5 B) It is the average mass of its isotopes weighted by abundance C) It has 35.5 protons D) It has 35.5 neutrons Answer: B

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Vitabu Vinavyopendekezwa

Pearson Edexcel International GCSE (9-1) Science Single Award Student Book

Manukuu: First edition

Mchapishaji: Pearson Education

Mwaka: 2018

ISBN: 978-0-435-19148-5

Maelezo: Endorsed student book for 4SS0.

Jifunze zaidi kutoka vyanzo huria

Sehemu ya kitabu Atomic Structure and Symbolism OpenStax · Chemistry
Write and interpret symbols that depict the atomic number, mass number, and charge of an atom or ion

"Chemistry: Atomic Structure and Symbolism" by OpenStax, OpenStax, Rice University, licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Source: https://openstax.org/books/chemistry/pages/2-3-atomic-structure-and-symbolism. Access for free at https://openstax.org/books/chemistry/pages/1-introduction
Sehemu ya kitabu Evolution of Atomic Theory OpenStax · Chemistry
Outline milestones in the development of modern atomic theory

"Chemistry: Evolution of Atomic Theory" by OpenStax, OpenStax, Rice University, licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Source: https://openstax.org/books/chemistry/pages/2-2-evolution-of-atomic-theory. Access for free at https://openstax.org/books/chemistry/pages/1-introduction

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