return the definition of an element or isotope - Maple Help

# Online Help

###### All Products    Maple    MapleSim

Home : Support : Online Help : Science and Engineering : Scientific Constants : Functions : ScientificConstants/GetElement

ScientificConstants[GetElement] - return the definition of an element or isotope

 Calling Sequence GetElement( descriptor, 'symbol', 'name', 'names', prop_name )

Parameters

 descriptor - name, symbol, or atomic number of an element, or isotope syntax of an isotope. For a description of the isotope syntax, see Element 'symbol' - (optional); include symbol in output 'name' - (optional); include name in output 'names' - (optional); include names in output prop_name - (optional) symbol; include value of specified property(ies) prop_name of element (or isotope) in output symbols. This parameter can be repeated to specify multiple properties.

Description

 • The GetElement( descriptor ) command returns the definition of an element or isotope in the ScientificConstants package.
 For an element, the expression sequence returned consists of the element's atomic number and equations that specify its symbol, name, set of multiple names, and defined properties, in the same format used for AddElement.
 For an isotope, the expression sequence returned consists of the isotope syntax in atomic_symbol[mass_number] format and equations that specify its defined isotopic properties, in the same format used for AddElement.
 • If none of the optional parameters are given, the full definition of the element or isotope is returned.  If any of the optional parameters are given, the output is restricted to the indicated items.
 Only the optional property name parameters are valid for isotopes. That is, you cannot specify 'symbol', 'name', or 'names'.

Examples

 > $\mathrm{with}\left(\mathrm{ScientificConstants}\right):$
 > $\mathrm{GetElement}\left(\mathrm{Ga},\mathrm{name},\mathrm{meltingpoint},\mathrm{boilingpoint}\right)$
 ${31}{,}{\mathrm{name}}{=}{\mathrm{gallium}}{,}{\mathrm{meltingpoint}}{=}\left[{\mathrm{value}}{=}{302.91}{,}{\mathrm{uncertainty}}{=}{\mathrm{undefined}}{,}{\mathrm{units}}{=}{K}\right]{,}{\mathrm{boilingpoint}}{=}\left[{\mathrm{value}}{=}{2477.}{,}{\mathrm{uncertainty}}{=}{\mathrm{undefined}}{,}{\mathrm{units}}{=}{K}\right]$ (1)
 > $\mathrm{GetIsotopes}\left(\mathrm{element}=\mathrm{Ga},\mathrm{abundance}\right)$
 ${{\mathrm{Ga}}}_{{69}}{,}{{\mathrm{Ga}}}_{{71}}$ (2)
 > $\mathrm{GetElement}\left({1}_{},\mathrm{abundance}\right)$
 ${{\mathrm{Ga}}}_{{69}}{,}{\mathrm{abundance}}{=}\left[{\mathrm{value}}{=}{0.60108}{,}{\mathrm{uncertainty}}{=}{0.00009}{,}{\mathrm{units}}{=}{1}\right]$ (3)

## Was this information helpful?

 Please add your Comment (Optional) E-mail Address (Optional) What is ? This question helps us to combat spam