Unit 6 1.1-1.2 Flashcards
The organized study of the composition an interaction of matter
Chemistry
Proposed the atomic theory
John dalton
Composed of single typed atoms
Elements
Composed of more than one type of atom
Compounds
Groups of atoms linked together
Molecule
Physical combinations of elements and compounds
Mixtures
Metal mixtures
Alloys
In this system each element is given a unique abbreviation or
Chemical symbol
Atoms are composed of still smaller particularly called
Subatomic particles
The dense center core
Nucleus
Subatomic particles found in the nuclei
Nucleons
A positive electrical charge
Proton
The number of protons in the nucleus in the atoms
Atomic number
Electrically neutral
Neutron
Atoms that are the same element but have different numbers of buttons
Isotopes
Composes neutrons and protons
Quarks
Quarks are needed to make what
A neutron or a proton
Quarks are held together by
Color force
Negative charge
Electrons
Electrons are arranged in concentric layers hat surround he nucleus each layer is called
Electron shell
And atom with an electrical charge
Ion
Negative ion
Anion
Positive charge
Cation
He total number of protons and neutrons in the nucleus
Mass number
Because atoms are so small he masses of atoms are usually measured in
Atomic mass units
Quantum theory
Tiny practicals such as electrons do not flow. Rather energy is always absorbed or realized in a descents packet called a quantum
Bohr model
Most familiar model
Pictures he nucleus surrounded be electrons that move in a circle orbit at specific energy levels
Wave mechanical model
Explained some puzzling things of atomic structures
Heiden berg uncertainty principle
Electrons are too tiny to pin down and study.
The over all motion of each electron can be mathematically represented by
Quantum numbers
Pauli exclusion principle
No two electrons in an atom can have the same four quantum numbers
