One type of atomic clock uses Rubidium.
Element 55 is cesium (spelled caesium in Britain).
On clock dials to flouresce in the dark. It is also used in the atomic clock. Cesium formate is sometimes used in oil drilling.
Hydrogen
either uranium or plutonium may be used in fission bombs, hydrogen and/or lithium may be used in fusion bombs.
The atomic weight that is listed on the periodic table for each element is the weighted average of the atomic masses of an element's naturally occurring isotopes. So you are describing atomic weight as it is used on the periodic table.
Element 55 is cesium (spelled caesium in Britain).
The Atomic Clock was invented in 1949, and is still used today.
Uranium and plutonium.
strontium or cesium
Both uranium and plutonium were used extensively to make the first two atomic bombs, dropped on Hiroshima and Nagasaki, respectively.
The element described is silver.
The element first used for fission in an atomic bomb is uranium.
The atomic number of an element depends on the number of protons in that element.
The element described is silver.
The element with the atomic number 47 is silver (Ag), and it is used to make photographic film and paper. But the atomic number determined the answer, not its use.
Actually, atomic is not a root word, but an adjective that is used to give description to other words. Example: atomic clock The root word for atomic is atom, which is used as 'the basic unit of a chemical element.' It comes from the Latin word atomos which basically means 'can not be divided.'
An atomic clock is a clock that uses an electronic transition frequency in the microwave, optical, or ultraviolet region of the electromagnetic spectrum of atoms as a frequency standard for its timekeeping element. Atomic clocks are the most accurate time and frequency standards known, and are used as primary standards for international time distribution services, to control the wave frequency of television broadcasts, and in global navigation satellite systems such as GPS.