Einsteinium was discovered as the debris of the first hydrogen bomb explosion in 1952, and named after Albert Einstein.

Einsteinium is the element with the highest atomic number which has been observed in macroscopic quantities in its pure form, and this was the common short-lived isotope einsteinium-253.

Einsteinium was first identified in December 1952 by Albert Ghiorso and co-workers at the University of California, Berkeley in collaboration with the Argonne and Los Alamos National Laboratories, in the fallout from the Ivy Mike nuclear test.

Einsteinium ( ) is a synthetic element with the symbol Es and atomic number 99.

Einsteinium is a soft, silvery, paramagnetic metal.

| E || Einsteinium || 99 || Current symbol is Es.

( Einsteinium and fermium had also been proposed as names of new elements while Einstein and Fermi were still living, but only made public after their deaths, due to Cold War secrecy.

Einsteinium ( Es ) is an artificial element, and thus a standard atomic mass cannot be given.

But her prettiness was what he had noticed first, and all the other things had come afterward: cruelty, meanness, self-will.

There was an artificial lake just out of sight in the first stand of trees, fed by a half dozen springs that popped out of the ground above the hillside orchard.

The first part of the road was steep, but it leveled off after the second bend and curled gradually into the valley.

No one was behind it, but in the rear wall of the office I noticed, for the first time, a door which had been left partially open.

The herd was watered and then thrown onto a broad grass flat which was to be the first night's bedground.

Once again, Tom Horn was the first and most likely suspect, and he was brought in for questioning immediately.

For Matilda, it was the first she had known in many a night.

Even the knowledge that she was losing another boy, as a mother always does when a marriage is made, did not prevent her from having the first carefree, dreamless sleep that she had known since they dropped down the canyon and into Bear Valley, way, way back there when they were crossing those other mountains.

Stevens was grunting over the last empty pocket when Russ abruptly rose and lunged toward Carmer's hat, which had tumbled half-a-dozen feet away when he first fell.

The Indian's arm whipped sidewise -- there was a flash of amber and froth, the crash of the bottle shattering against the side of the first car.

It was her first smile.

At first, I thought he was out of his head, talking wildly like this.

Hell, I gave him the first decent job he ever had, six, seven -- how many years ago was it, Rob ''??

Miss Langford ( her first name was Evelyn ) was an attractive girl.

School began in August, the hottest part of the year, and for the first few days Miss Langford was very lenient with the children, letting them play a lot and the new ones sort of get acquainted with one another.

It was just as well that the ignorant Dandy enjoyed himself to the hilt that first evening, for the room was to become his prison cell.

`` Bastards '', he would say, `` all I did was put a beat to that Vivaldi stuff, and the first chair clobbered me ''!!

In 1961 the first important legislative victory of the Kennedy Administration came when the principle of national responsibility for local economic distress won out over a `` state's-responsibility '' proposal -- provision was made for payment for unemployment relief by nation-wide taxation rather than by a levy only on those states afflicted with manpower surplus.

The first systematic thinking about this Pandora's box within Pandora's boxes was done four years ago by Fred Ikle, a frail, meek-mannered Swiss-born sociologist.

The smell at first was more surprising than unpleasant.

His collaboration with Washington, begun when he was the general's aide during the Revolution, was resumed when he entered the first Cabinet as Secretary of the Treasury.

`` You owe it to Penny to give her a chance to explain that she was defending you, really '', he observed mildly.

From L'Turu, I heard that until about 1850 the people of this island -- which was about the size of Guam or smaller -- had been of both sexes, and that the normal family life of Melanesian tribes was observed here with minor variations.

As he watched the man sit suddenly, a detached part of his mind observed how very difficult it was, really, to knock a man off his feet.

A set of tables containing spectral intensities for 39,000 lines of 70 elements, as observed in a copper matrix in a d-c arc, was completed and published.

Steady radiation which was presumably of thermal origin was observed from Venus at 3.15 and 9.4 cm, and from Mars and Jupiter at 3.15 cm in 1956 ( Mayer, McCullough, and Sloanaker, 1958, A, B, C ), and from Saturn at 3.75 cm in 1957 ( Drake and Ewen, 1958 ).

The fraction of exchange was determined as the ratio of the counts / minute observed in the carbon tetrachloride to the counts / minute calculated for the carbon tetrachloride fractions for equilibrium distribution of the activity between the chlorine and carbon tetrachloride, empirically determined correction being made for the difference in counting efficiency of Af in Af and Af.

By comparing reaction cells sealed from the same manifold temperature dependency corresponding to activation energies ranging from 11 to 18 Af was observed while dependence on the first power of the light intensity seemed to be indicated in most cases.

Exchange was also observed in these cells, which had chlorine present at Af.

In the Sacramento valley in California, for instance, it has been observed that there was not one day's difference between the emergence of the andrenas and the opening of the willow catkins.

It was observed that EWC macromolecules are the same diameter ( 15 a. ) but much longer ( up to several microns ) than vertebrate tropocollagen.

It was observed in the introductory chapter that metropolitan life had split into two trends -- expanding interdependence on an impersonal basis and growing exclusiveness in local communal groupings.

Frederick Douglass once observed of Lincoln: " In his company, I was never reminded of my humble origin, or of my unpopular color ".

There was a tendency in late eighteenth century Enlightenment thought to understand human society as natural phenomena that behaved according to certain principles and that could be observed empirically.

Within a few minutes, Johnston was observed by his staff to be nearly fainting off his horse.

These terms have historically been applied to any astronomical object orbiting the Sun that did not show the disk of a planet and was not observed to have the characteristics of an active comet, but as small objects in the outer Solar System were discovered, their volatile-based surfaces were found to more closely resemble comets, and so were often distinguished from traditional asteroids.

Thus, the planetary model of the atom was discarded in favor of one that described atomic orbital zones around the nucleus where a given electron is most likely to be observed.

Looking back on this period ( in 1926 ) Milne observed that when he told his agent that he was going to write a detective story, he was told that what the country wanted from a " Punch humorist " was a humorous story ; when two years later he said he was writing nursery rhymes, his agent and publisher were convinced he should write another detective story ; and after another two years he was being told that writing a detective story would be in the worst of taste given the demand for children's books.

His reception remained warmer in America than Britain, and he continued to publish novels and short stories, but by the late 1930s the audience for Milne's grown-up writing had largely vanished: he observed bitterly in his autobiography that a critic had said that the hero of his latest play (" God help it ") was simply " Christopher Robin grown up ... what an obsession with me children are become!

A tradition at one time observed on this day in England was to leave out soul cakes and sing a song for the dead.