Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
27 Cards in this Set
- Front
- Back
|
Isotopes
|
Atoms of the same element with different numbers of neutrons.
|
|
|
Atomic Number
|
The number of protons in the nucleus of an atom.
|
|
|
Mass Number
|
The number of protons & neutrons in the nucleus of an atom.
|
|
|
Ion
|
A positively or negatively charged atom or group of atoms.
|
|
|
Relative Isotopic Mass
|
The mass of an atom of an isotope relative to 1/12 the mass of an atom of carbon-12.
|
|
|
Relative Atomic Mass
|
The weighted mean mass of an atom of an element relative to 1/12 the mass of an atom of carbon-12.
|
|
|
Relative Molecular Mass
|
The weighted mean mass of a molecule relative to 1/12 the mass of an atom of carbon-12.
|
|
|
Relative Formula Mass
|
The weighted mean mass of a formula unit relative to 1/12 the mass of an atom of carbon-12.
|
|
|
Amount of Substance
|
Used as a means of counting atoms. (Unit is the mole)
|
|
|
Avogadro's Constant
|
>Number of atoms within 1 mole.
>6.02x10^23 atoms. |
|
|
A Mole
|
>6.02x10^23 atoms
>Relative atomic mass expressed in grams. |
|
|
Molar Mass
|
Mass per mole of a substance.
|
|
|
Empirical Formula
|
Simplest whole number ratio of elements present within a compound.
|
|
|
Molecule
|
Group of atoms held together by covalent bonds.
|
|
|
Molecular Formula
|
The actual number of atoms of each element in a molecule.
|
|
|
Standard Solution
|
Solution where concentration is known to determine the concentration of another substance.
|
|
|
Acid
|
A proton donor.
|
|
|
Base
|
Proton acceptor.
|
|
|
Alkali
|
A base that will dissolve in water forming hydroxide (OH-) ions.
|
|
|
Salt
|
Formed when a H+ ion is replaced by a metal or other positive ion. (e.g ammonium NH4)
|
|
|
Cation
|
Positively charged ion.
|
|
|
Anion
|
Negatively charged ion.
|
|
|
Hydrated Compound
|
Compound containing water of crystallisation molecules.
|
|
|
Anhydrous Substance
|
Substance that contains no water of crystallisation molecules.
|
|
|
Oxidation
|
>Loss of electrons.
>Increase in oxidation number. |
|
|
Reduction
|
>Gain of Electrons.
>Decrease in oxidation number. |
|
|
Redox Reaction
|
A reaction where both a reduction and oxidation take place.
|
