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chem words 4 im

6/9/10 definitions unit 1

Atom Smallest part of an element.
Element Made up of a group on one type of atom.
Ion An atom with a charge.
Molecule Covalently bonded group of atoms.
Compound More than one element chemically bonded.
Empirical Formula Simplest ratio of elements in a compound.
Molecular formula Actual number of atoms that make up the molecule.
Relative Atomic mass The average mass of its isotopes compared to a carbon-12 atom
Molar Mass relative molecular or formula mass(gmol-1)
Amount of substance Any elements relative mass in grams contains same the number of atoms as one mole of carbon-12
Relative Isotopic mass mass of each isotope of an ELEMENT compares to on atom of C-12
Relative Molecular Mass mass of each isotope of an COMPOUND compares to on atom of C-12
Steps in mass spectrometry Vaporisation>ionisation>acceleration >deflection>detection
Relative Molecular mass ( from ms) peak on ms with greatest m/z value.
Relative atomic mass ( from ms) relative atomic abundance x relative isotopic mass/ total abundance
Created by: Sonialancaster