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CHEM 090 Lecture 4


What is an atom? The fundamental building blocks of matter
Atoms are made up of? Protons, Neutrons and Electrons
Neurons and protons makes up? The neucleus
What is the atomic number? Number of protons
What is the atomic mass? Number of protons + number of electrons
What charge do protons have? Positive
What charge do electrons have? Negative
What charge do neutrons have? Neutral
Why are Neutrons neutral? Positive protons are the same as negative electrons so neutrons are neutral to cancel each other and give the atom a neutral charge
The way electrons are placed into shells of an atom are called Electronic configuration
The most outer shell in an atom is called. Valence shell
What are isotopes? Atoms of the same element with the same number of protons and electrons but different number of neutrons
Created by: Tee Taylor