What was going on when I was born?

George Washington's false teeth were reported missing today from the National Museum of American History. The teeth, made of gold and ivory and not wood, as rumor would have it, were fashioned in 1795 by his dentist, John Greenwood, according to Ellen McCalester, librarian at Mount Vernon.

The Security Council unanimously approved a resolution today that ''strongly condemned'' Israel's destruction of an Iraqi nuclear reactor. The resolution, the product of negotiations between the United States and Iraq, Council speeches, pages 4 and 5. also urged Israel to open its nuclear plants to international inspection. Today's action, however, imposed no new burden on either Israel or its military suppliers. Jeane J. Kirkpatrick, the American delegate, said that Israel warranted condemnation for failing to exhaust all diplomatic recourses to deal with its concern that Iraq would build a nuclear bomb. ''The means Israel chose to quiet its fears have hurt, and not helped, the peace and security of the area,'' she said.

INTERNATIONAL A unanimous Security Council vote approved a resolution that "strongly condemned" Israel for its destruction of an Iraqi nuclear reactor and urged Israel to open its nuclear plants to international inspection. The resolution was agreed to on Thursday by the United States and Iraq. Jeane K. Kirkpatrick, the chief American delegate to the United Nations, said Israel deserved condemnation for not using all diplomatic means to deal with its concern that Iraq would build a nuclear bomb. She said, however, that "nothing in the resolution will affect my Government's commitment to Israel's security." (Page 1, Column 6.) Iraq intended to build a nuclear bomb, according to a former inspector for the International Atomic Energy Agency. The former inspector, Roger Richter, told a hearing of the Senate Foreign Relations Committee that international safeguards would not have detected Iraq's secret production of plutonium, which is needed for a bomb. He also said that his concern over the agency's constraints on inspection of the Iraqi nuclear reactor led him to report to the State Department last year. He said that on the basis of available information, Iraq had an "aggressive, coordinated program" to develop the ability to make nuclear weapons in the next five years. (1:4-5.)

The Monday deadline for a threatened strike by air traffic controllers that would seriously disrupt air travel nationwide was eased conditionally today when the president of the controllers' union said he would delay a walkout if an agreement seemed near and talks were continuing. Airlines report that they have received many phone calls requesting information about flights next week but that reservations for the weekend have not risen substantially in anticipation of a strike. Should there be a strike, regularly scheduled flights of 500 miles or more are to continue on schedule under a priority system set up by the Federal Aviation Agency. (Page 48.)

A former inspector for the International Atomic Energy Agency said here today that Iraq had been planning to develop atomic bombs using the nuclear reactor destroyed by Israel and that international safeguards would not have detected secret production of plutonium in the reactor for weapons. The former inspector, Roger Richter, was one of three people familiar with nuclear reactors to testify this morning that Iraq was capable of using the reactor bombed on June 7 to produce plutonium, which can be used to make atomic weapons. But neither of the other witnesses, Robert Seldon, head of the applied theoretical physics division at Los Alamos Laboratory, nor Herbert J.C. Kouts, chairman of the department of nuclear energy at Brookhaven National Laboratory, would say under questioning if he believed that Iraq was in fact planning to use the reactor to produce fissionable material for weapons. Testifying before the Senate Foreign Relations Committee, Mr. Richter said his concern over agency constraints in inspecting the Iraqi reactor led him to report his misgivings to the State Department last year. He said that he had never personally inspected the reactor, explaining that checks of the Iraqi plant had been conducted only by Soviet or Eastern European members of the International Atomic Energy Agency.

Western Europe's Ariane rocket rose from its jungle launching pad here today, the reverberations rolling across the wild coastal savanna, and successfully boosted two satellites into orbit around the earth. The performance of the 155-foot-tall rocket was reported to be ''perfectly normal,'' following a failure the last time it was launched. This moved the 11-nation European Space Agency closer to realizing its goal of an independent and active space-launching program. One more test flight is scheduled this November, and the Ariane is expected to begin operational flights next year, with perhaps four or five launchings annually.

President Reagan joined a new budget battle with Democrats on Capitol Hill today by strongly endorsing a Republican proposal to change the basic spending priorities established by House committees over the last month. ''The American people have waited patiently for a full-scale attack on runaway spending,'' Mr. Reagan declared in a statement issued as he left for the weekend at Camp David in Maryland. ''Let Text of Reagan statement, page 10. there be no doubt: We can and we will put a stop to the fiscal joy ride in Washington.''

July 1 was to have been a climactic day in the political career of Prime Minister Pierre Elliott Trudeau. Canada's national holiday, commemorating the establishment of the Canadian federation in 1867, would have been marked this year by the completion of its independence from Britain with the proclamation of a new constitution. Or so Mr. Trudeau had hoped. The nine judges of the Supreme Court have upset his timetable by not yet deciding on the Government's proposals to transform the British North America Act into a constitution controlled exclusively by Canada. Eight of the 10 provinces are bitterly contesting the plan, and six weeks ago the Supreme Court was asked to rule on its legality.

A May 17 statement on press freedom by leaders of news organizations meeting in Talloires, France, was made public with a sentence inadvertently dropped, according to a spokesman for the World Press Freedom Committee, one of the co-sponsors of the conference. The text of the statement was published in the May 18 editions of The New York Times.

Terrorists struck four times in different sections of Rome today, killing a deputy police superintendent and wounding his driver, wounding a lawyer, shooting a publishing executive in the legs and firing on a police patrol. In Pescara, on the Adriatic coast, terrorists reportedly killed the brother of a former member of the Red Brigades terrorist organization who had cooperated with the police. An anonymous caller who said he was speaking for the Red Brigades told the Rome newspaper Il Giornale d'Italia that the deputy superintendent, Sebastiano Vinci, had been ''executed'' as a counterrevolutionary. He was fatally shot and his driver was seriously wounded as their car slowed at an intersection.

Canadian officials say they hope they will be able to discontinue a daily discharge of more than 500,000 gallons of chlorinated raw sewage into the Niagara River within a few days. The discharge began Monday when an explosion disabled a Fort Erie pumping station. It will continue until officials are sure that suspected leaks from gasoline tanks, which they believe caused the explosion, have been fixed.

The first Arab nuclear conference ended here today with the establishment of a committee to coordinate efforts toward setting up nuclear power stations in Arab countries. Delegates to the conference, attended by 10 Arab countries and the Palestine Liberation Organization, issued a final statement calling for cooperation in acquiring nuclear technology and exploiting it for peaceful purposes, especially for generating electricity. The delegates decided that Arab nuclear conferences should be held every three years, and a follow-up committee was formed, headed by the energy ministers of Syria and the United Arab Emirates.