Dating Techniques Flashcards
what is defined as a fundamental scientific phenomenon useful for providing information on the nature or composition of substances?
an analytical technique
what is defined as the application of a technique to solve an analytical problem?
an analytical method
what is defined as written instructions for carrying out a method with an outline of steps to be followed?
a procedure
what are the 7 steps of selecting and applying an analytical technique?
- define the analytical problem
- select the appropriate method
- pretreat the sample if necessary
- perform measurements required
- compare results to ensure desired degree of precision is met
- use statistical methods to make sense of results
- present results
what needs to be determined to define the analytical problem?
availability of the sample nature of the sample end of use of results the species to be analysed information required from the procedure
define matter
material that comprises the universe
consists of a limited number of simple substances
define element
matter with only one type of atom
define compound
substance with 2 or more elements in a fixed proportion
define molecule
particular combination of elements
define mixture
2 or more substances with variable compositions
what is the term used for a composition with 2 or more substances in variable proportions?
heterogeneous
what is the term used for a composition with a uniform distribution of substances?
homogeneous
which is bigger, an electron or a proton?
proton
what is the charge of an electron?
1-
what is the charge of a proton?
1+
