Atomic Theory: Identifying Protons, Neutrons, and the Nucleus, Schemes and Mind Maps of Chemistry

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ATOMIC THEORY

IDENTIFYING PROTONS, NEUTRONS, NUCLEUS

The word atom originally came from the Greeks word A’TOMOS which means unable to cut The atom is the smallest unit of matter. This Photo by Unknown Author is licensed under CC BY-NC-ND

USING THE PERIODIC TABLE

ATOMIC NUMBER

(smaller number) SYMBOL the periodic table is a reference tool for identifying ELEMENT NAME useful information for elements ATOMIC MASS (larger number)

Ca Calcium

USING THE PERIODIC TABLE

The periodic table is a tool used to identify the number of protons , neutrons , and electrons in an element. Atomic number = p+ and e- Ex calcium has 20 protons and 20 electrons Neutrons = atomic mass Ex. 40 - 20 = 20 neutrons

• atomic number neutrons

Ca Calcium

You try answers

Using a period table from the internet or your textbook, answer the following: What is the atomic number of sulfur? 16 What is the atomic mass of sulfur? 32.06 a.m.u. How many protons, neutrons, and electrons does an atom of copper have? Protons = 29 neutrons = 64 - 29 = Electrons = 29