cuprum
n . 铜
铜
Cuprum \
Cu "
prum \ (
k ?"
pr ?
m ),
n . [
L .] (
Chem .)
Copper .
[
1913 Webster ]
Element \
El "
e *
ment \,
n . [
F . ['
e ]
l ['
e ]
ment ,
L .
elementum .]
1 .
One of the simplest or essential parts or principles of which anything consists ,
or upon which the constitution or fundamental powers of anything are based .
[
1913 Webster ]
2 .
One of the ultimate ,
undecomposable constituents of any kind of matter .
Specifically : (
Chem .)
A substance which cannot be decomposed into different kinds of matter by any means at present employed ;
as ,
the elements of water are oxygen and hydrogen .
[
1913 Webster ]
Note :
The elements are naturally classified in several families or groups ,
as the group of the alkaline elements ,
the halogen group ,
and the like .
They are roughly divided into two great classes ,
the metals ,
as sodium ,
calcium ,
etc .,
which form basic compounds ,
and the nonmetals or metalloids ,
as oxygen ,
sulphur ,
chlorine ,
which form acid compounds ;
but the distinction is only relative ,
and some ,
as arsenic ,
tin ,
aluminium ,
etc .,
form both acid and basic compounds .
The essential fact regarding every element is its relative atomic number ,
which is equal to the number of protons in the nucleus ,
and also equal to the number of electrons in orbitals around the nucleus when the atom is neutral .
When the elements are tabulated in the order of their ascending atomic numbers ,
the arrangement constitutes the series of the Periodic law of Mendelejeff .
See {
Periodic law },
under {
Periodic }.
This Periodic law enables us to predict the qualities of unknown elements .
The number of elements known in 1890 were about seventy -
five ,
but at that time the gaps in the Periodic law indicated the possibility of many more .
All of the elements up to atomic number 100 have now been observed though some are radioactive and very unstable ,
and in some cases cannot be accumulated in quantity sufficient to actually see by eye .
The properties predicted by the periodic law wre close to the observed properties in many cases .
Additional unstable elements of atomic number over 100 are observed from time to time ,
prepared in cyclotrons ,
particle acclerators ,
or nuclear reactors ,
and some of their properties are measurable by careful observation of microscopic quantities ,
as few as several atoms .
For such unstable elements ,
the properties are now predicted primarily by calculations based on quantum mechanics .
Such theories suggest that there may be an "
island "
of relative stability of elements of atomic number over 120 ,
but this has yet to be confirmed by experiment .
Many of the elements with which we are familiar ,
as hydrogen ,
carbon ,
iron ,
gold ,
etc .,
have been recognized ,
by means of spectrum analysis ,
in the sun and the fixed stars .
The chemical elements are now known not be simple bodies ,
but only combinations of subatomic particles such as protons ,
neutrons ,
and electrons ;
ahd protons and neutrons are now believed to be themselves combinations of quarks ,
particles which are not observed singly ,
but only in combinations .
In formulas ,
the elements are designated by abbreviations of their names in Latin or New Latin ,
given in the table below .
The atomic weights given in the table below are the {
chemical atomic weights },
in some cases being the weighted average of the atomic weights of individual isotopes ,
each having a different atomic weight .
The atomic weight of the individual isotopes are called the physical atomic weights .
In those few cases where there is only one stable isotope of an element ,
the chemical and physical atomic weights are the same .
The mass -
spectrometric atomic weights are those used for careful mass -
spectrometric measurements .
For more details about individual elements ,
see the element names in the vocabulary The Elements ----------------------------------------------------------
Name |
Sym -|
Atomic Weight |
|
bol |
O =
16 |
H =
1 |
C =
12 .
000 ----------------------------------------------------------
Aluminum |
Al |
27 .
1 |
26 .
9 |
Antimony (
Stibium ) |
Sb |
120 |
119 .
1 |
Argon |
A |
39 .
9 |
39 .
6 |
Arsenic |
As |
75 |
74 .
4 |
Astatine |
At |
Barium |
Ba |
137 .
4 |
136 .
4 |
Beryllium |
Be |
Bismuth |
Bi |
208 .
5 |
206 .
9 |
Boron |
B |
11 |
10 .
9 |
Bromine |
Br |
79 .
96 |
79 .
36 |
Cadmium |
Cd |
112 .
4 |
111 .
6 |
Cesium (
Caesium ) |
Cs |
133 |
132 |
Calcium |
Ca |
40 |
39 .
7 |
Carbon |
C |
12 |
11 .
91 |
12 .
000 Cerium |
Ce |
140 |
139 |
Chlorine |
Cl |
35 .
45 |
35 .
18 |
Chromium |
Cr |
52 .
1 |
51 .
7 |
Cobalt |
Co |
Columbium (
see {
Beryllium })
Copper |
Cu |
({
Cuprum })
Erbium |
Er |
Europium |
Eu |
Einsteinium |
Es |
Fermium |
Fe |
Fluorine |
F |
Gadolinium |
Gd |
Gallium |
Ga |
Germanium |
Ge |
Glucinum (
now {
Beryllium })
Gold (
Aurum ) |
Au |
Helium |
He |
Hydrogen |
H |
Indium |
In |
Iodine |
I |
Iridium |
Ir |
Iron |
Fe |
(
Ferrum )
Krypton |
Kr |
Lanthanum |
La |
Lead |
Pb |
(
Plumbum )
Lithium |
Li |
Magnesium |
Mg |
Manganese |
Mn |
Mercury |
Hg |
({
Hydrargyrum })
Molybdenum |
Mo |
Neodymium |
Nd |
Neon |
Ne |
Nickel |
Ni |
Niobium |
Nb |
(
see Columbium )
Nitrogen |
N |
Osmium |
Os |
Oxygen |
O |
Palladium |
Pd |
Phosphorus |
P |
Platinum |
Pt |
Potassium |
K |
(
Kalium )
Praseodymium |
Pr |
Rhodium |
Rh |
Rubidium |
Rb |
Ruthenium |
Ru |
Samarium |
Sa |
Scandium |
Sc |
Selenium |
Se |
Silicon |
Si |
Silver |
Ag |
(
Argentum )
Sodium |
Na |
(
Natrium )
Strontium |
Sr |
Sulphur |
S |
Tantalum |
Ta |
Tellurium |
Te |
Thallium |
Tl |
Thorium |
Th |
Thulium |
Tu |
Tin |
Sn |
(
Stannum )
Titanium |
Ti |
Tungsten |
W |
(
Wolframium )
Uranium |
U |
Vanadium |
V |
Wolfranium (
see {
Tungsten })
Xenon |
X |
Ytterbium |
Yb |
Yttrium |
Y |
Zinc |
Zn |
Zirconium |
Zr |
----------------------------------------------------------
[
1913 Webster ]
Note :
Several other elements have been announced ,
as holmium ,
vesbium ,
austrium ,
etc .,
but their properties ,
and in some cases their existence ,
have not yet been definitely established .
[
1913 Webster ]
3 .
One of the ultimate parts which are variously combined in anything ;
as ,
letters are the elements of written language ;
hence ,
also ,
a simple portion of that which is complex ,
as a shaft ,
lever ,
wheel ,
or any simple part in a machine ;
one of the essential ingredients of any mixture ;
a constituent part ;
as ,
quartz ,
feldspar ,
and mica are the elements of granite .
[
1913 Webster ]
The simplicity which is so large an element in a noble nature was laughed to scorn . --
Jowett (
Thucyd .).
[
1913 Webster ]
4 .
(
a )
One out of several parts combined in a system of aggregation ,
when each is of the nature of the whole ;
as ,
a single cell is an element of the honeycomb .
(
b ) (
Anat .)
One of the smallest natural divisions of the organism ,
as a blood corpuscle ,
a muscular fiber .
[
1913 Webster ]
5 . (
Biol .)
One of the simplest essential parts ,
more commonly called cells ,
of which animal and vegetable organisms ,
or their tissues and organs ,
are composed .
[
1913 Webster ]
6 . (
Math .)
(
a )
An infinitesimal part of anything of the same nature as the entire magnitude considered ;
as ,
in a solid an element may be the infinitesimal portion between any two planes that are separated an indefinitely small distance .
In the calculus ,
element is sometimes used as synonymous with differential .
(
b )
Sometimes a curve ,
or surface ,
or volume is considered as described by a moving point ,
or curve ,
or surface ,
the latter being at any instant called an element of the former .
(
c )
One of the terms in an algebraic expression .
[
1913 Webster ]
7 .
One of the necessary data or values upon which a system of calculations depends ,
or general conclusions are based ;
as ,
the elements of a planet '
s orbit .
[
1913 Webster ]
8 .
pl .
The simplest or fundamental principles of any system in philosophy ,
science ,
or art ;
rudiments ;
as ,
the elements of geometry ,
or of music .
[
1913 Webster ]
9 .
pl .
Any outline or sketch ,
regarded as containing the fundamental ideas or features of the thing in question ;
as ,
the elements of a plan .
[
1913 Webster ]
10 .
One of the simple substances ,
as supposed by the ancient philosophers ;
one of the imaginary principles of matter .
(
a )
The four elements were ,
air ,
earth ,
water ,
and fire ;
Note :
whence it is said ,
water is the proper element of fishes ;
air is the element of birds .
Hence ,
the state or sphere natural to anything or suited for its existence .
[
1913 Webster ]
Of elements The grosser feeds the purer :
Earth the Sea ;
Earth and the Sea feed Air ;
the Air those Fires Ethereal . --
Milton .
[
1913 Webster ]
Does not our life consist of the four elements ?
--
Shak .
[
1913 Webster ]
And the complexion of the element [
i .
e .,
the sky or air ]
In favor '
s like the work we have in hand ,
Most bloody ,
fiery ,
and most terrible . --
Shak .
[
1913 Webster ]
About twelve ounces [
of food ],
with mere element for drink . --
Cheyne .
[
1913 Webster ]
They show that they are out of their element .
--
T .
Baker .
Esp .,
the conditions and movements of the air . "
The elements be kind to thee ."
(
b )
The elements of the alchemists were salt ,
sulphur ,
and mercury . --
Brande &
C .
[
1913 Webster ]
11 .
pl .
The whole material composing the world .
[
1913 Webster ]
The elements shall melt with fervent heat . --
2 Peter iii .
10 .
[
1913 Webster ]
12 .
pl . (
Eccl .)
The bread and wine used in the eucharist or Lord '
s supper .
[
1913 Webster ]
{
Magnetic element },
one of the hypothetical elementary portions of which a magnet is regarded as made up .
[
1913 Webster ]
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