The total number of known amphibian species is approximately 7, 000, of which nearly 90 % are frogs.

The numbers of species cited above follow Frost and the total number of known amphibian species is approximately 7, 000, of which nearly 90 % are frogs.

In chemistry and physics, the atomic number ( also known as the proton number ) is the number of protons found in the nucleus of an atom and therefore identical to the charge number of the nucleus.

The number of neutrons, N, is known as the neutron number of the atom ; thus, A = Z + N. Since protons and neutrons have approximately the same mass ( and the mass of the electrons is negligible for many purposes ), and the mass defect is usually very small compared to the mass, the atomic mass of an atom is roughly equal to A.

Atoms having the same atomic number Z but different neutron number N, and hence different atomic mass, are known as isotopes.

This placement is consistent with the modern practice of ordering the elements by proton number, Z, but this number was not known or suspected at the time.

Another problem was that the gradual identification of more and more chemically similar and indistinguishable lanthanides, which were of an uncertain number, led to inconsistency and uncertainty in the numbering of all elements at least from lutetium ( element 71 ) onwards ( hafnium was not known at this time ).

Nevertheless, in spite of Rutherford's estimation that gold had a central charge of about 100 ( but was element Z = 79 on the periodic table ), a month after Rutherford's paper appeared, Antonius van den Broek first formally suggested that the central charge and number of electrons in an atom was exactly equal to its place in the periodic table ( also known as element number, atomic number, and symbolized Z ).

The former represents a choice between a finite number of known and meaningful context-dependent interpretations.

Only a limited number of actinium compounds are known including AcF < sub > 3 </ sub >, AcCl < sub > 3 </ sub >, AcBr < sub > 3 </ sub >, AcOF, AcOCl, AcOBr, Ac < sub > 2 </ sub > S < sub > 3 </ sub >, Ac < sub > 2 </ sub > O < sub > 3 </ sub > and AcPO < sub > 4 </ sub >.

Until these experiments, atomic number was not known to be a physical and experimental quantity.

Ceremonial structures known as kivas were built in proportion to the number of rooms in a pueblo.

Throughout the southwest Ancient Puebloan region and at Mesa Verde, the best known site for these large number of well preserved cliff dwellings, housing, defensive and storage complexes were built in shallow caves and under rock overhangs along canyon walls.

In the quantum picture of Heisenberg, Schrödinger and others, the Bohr atom number n for each orbital became known as an n-sphere in a three dimensional atom and was pictured as the mean energy of the probability cloud of the electron's wave packet which surrounded the atom.

Vessels may carry a number of anchors: bower anchors ( formerly known as sheet anchors ) are the main anchors used by a vessel and normally carried at the bow of the vessel.

Computer programs, known as " anagram servers ", " anagram solvers " or " anagrammers ", offer a much faster route to creating anagrams, and a large number of these programs are available on the Internet.

Additionally, the Lombards would have known of the weakness of Byzantine Italy, which had endured a number of problems after being retaken from the Goths.

They were organised at the national level, with offices in a number of London inns and taverns such as The Rosemary Branch in Islington which got its name from the sprigs of rosemary that Levellers would wear in their hats as a sign of identification.

In 1724 there was a rising against enclosures in Galloway, and a number of men who took part in it were called “ Levellers ” or “ Dykebreakers ”.

Around this time Friend and Chadwick played a number of low key shows as " The Levellers 2 ", mostly performing songs that had been in Friend's repertoire as a solo singer-songwriter.

1991 saw the release of the Levellers ' second album, Levelling the Land, which entered the charts at number 14.

The Putney Debates were a series of discussions between members of the New Model Army – a number of the participants being Levellers – concerning the makeup of a new constitution for England.

Cromwell captured and imprisoned the Levellers ' " agitators " and a number were sentenced to death, though only one was actually executed.

" Beiderbecke biographer Lion has complained that the second number was marred by the alcohol consumed by the musicians.

Finney became so well known for the role that he complained that it typecast him for a number of years.

As the number of players decreased, standards began to slip ; that they did so precipitously is confirmed by a mid-18th century Bolognese source that complained that the instrument ’ s daily appearances in the town square had become ‘ a public scandal ’ ( see Gambassi ).

During the 1980s, Le Pen complained about the rising number of " social parasites ", and called for deregulation, tax cuts, and the phasing-out of the welfare state.

Yvette Rosser has criticized the film for contributing to racist stereotypes of Indians in western society, writing " seems to have been taken as a valid portrayal of India by many teachers, since a large number of students surveyed complained that teachers referred to the eating of monkey brains.

We do know that many graves went unmarked and eventually gravediggers complained that no matter where they dug, they hit previously buried coffins. The exact number of people buried here will never be known.

In his speeches in the late 1920s, Nazi leader Adolf Hitler complained bitterly about the presence of Jewish conductors at the Berlin opera, and mentioned Walter a number of times, adding to Walter's name the phrase, " alias Schlesinger.

Since it was unusual for popular musicians to be appointed as MBEs, a number of previous recipients complained and protested.

Other reviewers complained generally about the broad mix of genres and number of subplots in the pilot.

The 1983 West Bank fainting epidemic was a series of incidents in March 1983 in which 943 Palestinian teenage girls, mostly schoolgirls, and a small number of IDF women soldiers fainted or complained of feeling nauseous in the West Bank.

Villagers later complained that the Haganah had ( as in Sumeiriya and al-Bassa ) " molested or violated " a number of women.

Protesters complained that the tax shifted from the estimated price of a house to the number of people living in it, with the effect of shifting the tax burden from the rich to the poor.

Upon the release of the Game Boy Advance in June 2001, a vast number of users of the Game Boy Advance complained about the screen's poor visibility ; with no internal backlight or frontlight the LCD was only visible in direct light, too much of which would cause glare.

They complained in particular that " in by far the greater number of cases, it is a large almshouse, in which the young are trained in idleness, ignorance, and vice ; the able-bodied maintained in sluggish sensual indolence ; the aged and more respectable exposed to all the misery that is incident to dwelling in such a society ".

After a number of people at the show complained about the microkernel's lack of sophistication, notably the lack of symmetric multiprocessing — a feature that would be exceedingly difficult to add on to an already existing system within a few months — Amelio came back on stage and announced that they would be adding that to the feature list.

Among the negatives of the closure concerned the reception of RTÉ Radio One in Northern Ireland where certain areas were unable to get an FM transmission from the Republic such as parts of Belfast and county Antrim ( although the LW service covers all of Northern Ireland ), fishermen were another group who complained about the loss as did the elderly and a number of pressure groups.

Richthofen then complained he did not have the adequate forces to stop the Soviets evacuating by sea, but Axis aviation did inflict considerable attrition on Soviet units on the beaches and sank a number of vessels.

The largest number of them were in the military, which complained about having its budget cut from 10 % of China's total GDP in 1978 to 5 % by 1982.

However, the players and fans complained about the huge outfield, which reduced the number of home runs.

In a number of cases, local officials have complained that this impedes their ability to question suspects and investigate the crime.

The new process was introduced in Scotland, but before it had become fully operational across the UK a number of English universities complained about the administrative burden that this approach entailed, leading to a rethink by the Westminster government.

At times the prison was guarded by a number of troops on loan from Tasmania until 1846 when Francis Dutton, who went on to become the seventh Premier of South Australia in 1863, complained that the gaol was both an eyesore and a waste of money as since being opened it had housed on average only two prisoners per month.

Human rights organizations, newspaper columnists, political personalities and opposition groups complained about an increase in the number of arbitrary detentions and acts of torture as a result.

On 23 May 1655, a number of them, including Alexander, complained of this inevitable outgrowth of bondage and petitioned the General Court of Massachusetts for freedom, but their request was refused.