Science Benchmark Study Guide (Atoms & Periodic Table)

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Terms in this set (...)

Nucleus and orbitals
The two parts of an atom
Proton
Subatomic particles with a positive charge. They identify an element
Neutron
Subatomic particles that has a neutral charge. They add mass to the atom
Electron
Subatomic particles with a negative charge. They are in charge of bonding
Valence electrons
The outer most electrons
2 electrons
1st shell has...
8 electrons
2nd shell has...
18(8) electrons
3rd shell has...
Unpaired electrons
Reactive atoms have _______________________________
Ion
The charge an atom has
4 or less
Atoms want to give away electrons if they have __________________________ electrons in their outer shell
5 or more
Atoms want to take electrons if they have ___________________________ electrons in their outer shell
Atomic number
The number of protons or electrons in a ground state atom
Atomic mass
The number of protons and neutrons of an atom
Element symbol
What does the Fe represent?
D=m/v
Density formula
Densities
Materials have different __________________ due to the way its atoms are arranged and spaced
Bohr Diagram
Lewis dot diagram
Coefficient
The number before an element symbol in a chemical equation
Subscript
A symbol showing how much of an element there is
Quarks
Subatomic particles can be further broken down into these smaller particles
The periodic table
The table showing the organization of all elements
Families
The group of elements all found in the same column
Periods
The group of elements all found in the same row
Physical change
A change that does not affect the element's chemical format. Once it is changed, it can be brought back again
Chemical change
A change that affects an element's chemical format. Once the element has changed, it cannot be brought back