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*ELEMENT

*ELEMENT is used to test for the presence of a specified element or set of elements.

Graphics QUEST3D Procedure

The equivalent test construction in Graphics QUEST3D is discussed under ELEMENTS.

Basic QUEST Procedure

Ex.1

T1 *ELEM Te

This will register hits for all entries containing tellurium.

Ex.2

T1 *ELEM 8Y

This will register hits for all entries containing elements of group 8Y, ie. Co,Rh,Ir.

Whereas Ex.1 illustrates a test for a single element, Ex.2 shows that tests can also be made on groups of elements.

The definition of group element symbols is given in Appendix 1 (bit screens 1-31) and below.

Group 1A   Li   Na    K   Rb   Cs   Fr
Group 2A   Be   Mg   Ca   Sr   Ba   Ra
Group 3B   Sc    Y   La   Ac
Group 4B   Ti   Zr   Hf
Group 5B    V   Nb   Ta
Group 6B   Cr   Mo    W
Group 7B   Mn   Tc   Re
Group 8X   Fe   Ru   Os
Group 8Y   Co   Rh   Ir
Group 8Z   Ni   Pd   Pt
Group 8B   Fe   Ru   Os   Co   Rh   Ir   Ni   Pd   Pt
Group 1B   Cu   Ag   Au
Group 2B   Zn   Cd   Hg
Group 3A    B   Al   Ga   In   Tl
Group 4A   Si   Ge   Sn   Pb
Group 5A    N    P   As   Sb   Bi
Group 6A    O    S   Se   Te   Po
Group 7A    F   Cl   Br    I   At
Group 8A   He   Ne   Ar   Kr   Xe   Rn
Group Ln   La   Ce   Pr   Nd   Pm   Sm   Eu   Gd   Tb   Dy   Ho   Er
           Tm   Yb   Lu
Group An   Ac   Th   Pa    U   Np   Pu   Am   Cm   Bk   Cf   Es   Fm
           Md   No   Lw
Group 1R   Sc   Ti    V   Cr   Mn   Fe   Co   Ni   Cu   Zn
Group 2R    Y   Zr   Nb   Mo   Tc   Ru   Rh   Pd   Ag   Cd
Group 3R   La   Hf   Ta    W   Re   Os   Ir   Pt   Au   Hg
Group Tr   Sc   Ti    V   Cr   Mn   Fe   Co   Ni   Cu   Zn
            Y   Zr   Nb   Mo   Tc   Ru   Rh   Pd   Ag   Cd
           La   Hf   Ta    W   Re   Os   Ir   Pt   Au   Hg   Ac
Group 1M   Li   Na    K   Rb   Cs   Fr
           Be   Mg   Ca   Sr   Ba   Ra
Group 2M   Al   Ga   In   Tl   Ge   Sn   Pb   Sb   Bi   Po
Group 3M   Li   Na    K   Rb   Cs   Fr
           Be   Mg   Ca   Sr   Ba   Ra
           Al   Ga   In   Tl   Ge   Sn   Pb   Sb   Bi   Po
Group 4M   Li   Na    K   Rb   Cs   Fr
           Be   Mg   Ca   Sr   Ba   Ra
           La   Ce   Pr   Nd   Pm   Sm   Eu   Gd   Tb   Dy   Ho   Er
           Tm   Yb   Lu
           Ac   Th   Pa    U   Np   Pu   Am   Cm   Bk   Cf   Es   Fm
           Md   No   Lw
           Sc   Ti    V   Cr   Mn   Fe   Co   Ni   Cu   Zn
            Y   Zr   Nb   Mo   Tc   Ru   Rh   Pd   Ag   Cd
           La   Hf   Ta    W   Re   Os   Ir   Pt   Au   Hg   Ac
Group HD    H    D
Group HH    H

 
As  1.5   Cr  1.8   I   3.4   Na  1.2   Pt  2.9   Se  1.2
B   4.5   Cu  5.3   K   1.1   Ni  3.3   Re  1.4   Si  3.5
Br  6.2   F   7.0   Mn  1.7   O  74.3   Rh  2.2   Sn  1.6
Cl 21.4   Fe  5.4   Mo  3.8   P  18.6   Ru  2.5   W   2.2
Co  4.1   Hg  1.1   N  57.3   Pd  1.6   S  20.5   Zn  1.1

Ex.3

T1 *ELEM H & N & Os

This will register hits for entries containing C,H,N,Os

This is an inclusive test

ie. the test will succeed if other elements are also present.

Ex.4

T1 *ELEM H + N + Os

This will register hits for entries containing only C,H,N,Os

This is an exclusive test

ie. the test will fail if any other elements are also present.

Note that & and + must not be used together in the same test.

Related Bit Screens

Bit screens 1-31 (see Appendix 1) can be used to screen the presence of elements.

In Ex.2 above the test automatically sets query screen 9 to 1.

Thus an alternative instruction would be:

SCRE  9

Examination of bit screens 1-31 in Appendix 1 shows that group 4A does not include carbon.

Note also that bit screen 30 must be used if no distinction is to be made between H and D; otherwise bit screen 31 is used for H.

Related Keywords

*NRESIDUES, *MAXATOMICNO, *SUMFORMULA, *RESFORMULA, *RESIDUE, *FORMULA

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Volume 2 Chapter 10 Search Menu ELEMENTS.