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What is an atom? (Structure (Center: Nucleus (Contains protons and…
What is an atom?
Structure
Center:
Nucleus
Contains protons and neutrons
Nucleus os positively charged
Around
the nucleus
Contains electrons
Equal to the positive charge; makes the atom neutral
Every atom has the
same number of protons, electrons, and neutrons
Characteristics
Creates everything
When atoms join they create molecules
When molecules join they create things
Small,
microscopic
Binding
Electrons move in shells
; each contains a fixed number
1 shell: 2 electrons
2 shell: 8 electrons
3 shell: 18 electrons
4 shell: up to 32 electrons (Valance shell)
Atoms bond with other atoms with the
valance electrons
It uses other atom's valance electrons to
fill its shell
Origin
Atom: "That which can't be cut"