Atomic Structure And Periodic Table

Front 1

Atomic Weight

Back 1

The weighted average of the masses of the naturally occurring isotopes of an element, in AMU per atom.

- A mole is a unit used to count particles and is represented by Avogadro's number (6.022 x 10^23 particles).

Front 2

Isotopes

Back 2

For a given element, multiple species of atoms with the same number of protons (same atomic number) but different numbers of neutrons (different mass numbers).

Front 3

Planck's Quantum Theory

Back 3

Energy emitted as electromagnetic radiation from matter exists in discrete bundles called quanta.

Front 4

Energy of Electron

Back 4

E = (-RH/n^2)

Front 5

Electromagnetic Energy of Photons

Back 5

E = (hc) / (gamma)

Front 6

Bohr's Model of the Hydrogen Atom

Back 6

The group of hydrogen emission lines corresponding to transitions from upper levels n>2 to n=2 is known as the blamer series, while the group corresponding to transitions between upper levels n>1 to n=1 is known as the Lyman series.

Front 7

Absorption Spectrum

Back 7

Characteristics energy bands where electrons absorb energy.

Front 8

Heisenberg Uncertainty Principle

Back 8

It is impossible to determine with perfect accuracy the momentum and the position of an electron simultaneously.

Front 9

Quantum Numbers

Back 9

Front 10

Principal Quantum Number (n)

Back 10

The larger the integer value of n, the higher the energy level and radius of the electron's orbit. The maximum number of electrons in energy level n is 2n^2.

Front 11

Azimuthal Quantum Number (l)

Back 11

Refers to sub-shells. The four sub-shells corresponding to l = 0, 1, 2, and 3 are known as s, p, d, and f; respectively. The maximum number of electrons that can exist within a sub-shell is given by the equation 4l + 2.

Front 12

Magnetic Quantum Number (ml)

Back 12

This specifies the particular orbital within a sub-shell where an electron is highly likely to be found at a given point in time.

Front 13

Spin Quantum Number (ms)

Back 13

The spin of a particle is its intrinsic angular momentum and is a characteristic of the particle, like it charge.

Front 14

Electron Configuration

Back 14

Front 15

Hund's Rule

Back 15

Within a given sub-shell, orbitals are filled such that there are a maximum number of half-filled orbitals with parallel spins.

Front 16

Valence Electrons

Back 16

Electrons of an atom that are in its outer energy shell and that are available for bonding.

Front 17

Periodic Table

Back 17

Front 18

Periodic Table

Back 18

Increases Up and to the Right: Effective Charge, Ionization Energy, Electronegativity, Electron Affinity.

Increases Down and to the Left: Atomic Radius.