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Integral number of protons in the nucleus, defines the identity of element.
 

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Ionization Energy

The minimum amount of energy required to remove the most loosely held electron of an isolated gaseous atom or ion.

Photochemical Oxidants

Photochemically produced oxidizing agents capable of causing damage to plants and animals.

Diagonal Similarities

Refers to chemical similarities in the Periodic Table of elements of Period 2 to elements of Period 3 one group to the right, especially evident toward the left of the periodic table.

Solvolysis

The reaction of a substance with the solvent in which it is dissolved.

Tyndall Effect

The scattering of light by colloidal particles.

Hund's Rule

All orbitals of a given sublevel must be occupied by single electrons before pairing begins.

Isotopes

Two or more forms of atoms of the same element with different masses, atoms containing the same number of protons but different numbers of neutrons.

Do you know: some mosquitoes bite people because of their clothes

If you have ever been bitten by a mosquito, someone nearby surely gave you an explanation of why the nasty insect decided to spoil your day. Maybe they told you that you smelt good, or you had a certain type of blood or that in that shirt you looked like a potential victim.

Radiation

High energy particles or rays emitted during the nuclear decay processes.

Free Energy Change

The indicator of spontaneity of a process at constnt T and P. If delta-G is negative, the process is spontaneous.