Hydrogen is the lightest element and exhibits the simplest atomic structure. In addition, it is the most abundant element in the universe and can form bonds to nearly every element, such as s- and p-block elements.
We know that the conditions in the first few minutes of the Universe were just right for nuclear fusion to form the very lightest elements: hydrogen, helium, and lithium.
Helium is considered to be the second lightest element after hydrogen. It is an inert gas. Helium is a colourless, odourless, and tasteless gas.
The lightest four elements are hydrogen, helium, lithium and beryllium.
Introduction. The term heavy metal refers to any metallic chemical element that has a relatively high density and is toxic or poisonous at low concentrations. Examples of heavy metals include mercury (Hg), cadmium (Cd), arsenic (As), chromium (Cr), thallium (Tl), and lead (Pb).
Uranium was discovered in 1789 by German chemist Martin Heinrich Klaproth. It is the heaviest naturally occurring element in the universe and is naturally radioactive. Its nucleus is unstable, so the element is in a constant state of decay, seeking a more stable arrangement.
Hydrogen: Hydrogen is the lightest gas present abundantly in the universe with an atomic mass of. 00784 u .
Magnesium is the lightest structural metal and abundantly available in the earth's crust and seawater.
The lightest in weight of all gases, hydrogen has been used for the inflation of balloons and dirigibles. It ignites very easily, however, a small spark causing it to burn, and several dirigibles, including the Hindenburg, have been destroyed by hydrogen fires.
Of all elements that are solid at room temperature, caesium is the softest: it has a hardness of 0.2 Mohs. It is a very ductile, pale metal, which darkens in the presence of trace amounts of oxygen.
Hydrogen is the lightest element and exhibits the simplest atomic structure. In addition, it is the most abundant element in the universe and can form bonds to nearly every element, such as s- and p-block elements.
With atomic weight equal to 1.008 amu, hydrogen is the lightest element in the periodic table.
Astronomical. Although it was synthesized in the Big Bang, lithium (together with beryllium and boron) is markedly less abundant in the universe than other elements. This is a result of the comparatively low stellar temperatures necessary to destroy lithium, along with a lack of common processes to produce it.
Boron is synthesized entirely by cosmic ray spallation and supernovae and not by stellar nucleosynthesis, so it is a low-abundance element in the Solar System and in the Earth's crust.
The next element, beryllium, is relatively rare in the universe because it is also not formed in the nuclear furnaces of stars. It takes a supernova, in which heavier nuclei disintegrate, to make this metal.
Therefore, Cesium is the softest metal.
Tungsten, which is Swedish for "heavy stone," is the strongest metal in the world. It was identified as a new element in 1781. It is commonly used to make bullets and missiles, metal evaporation work, manufacturing of paints, creating electron and Television tubes, and making glass to metal seals.
At environmental temperatures sulphur hexafluoride is a colourless, odourless, non-toxic gas of high chemical stability and inertness. It is also non-flammable and about 5 times heavier than air-one of the heaviest known gases.
Hydrogen and helium, the lightest two gases, weigh so little that helium balloons and hydrogen dirigibles are able to float in the atmosphere.
Helium is a more ideal gas than neon because its smaller number of electrons means that helium's dispersion forces are even weaker than those of neon. Ask your own question!
Ununennium, also known as eka-francium or element 119, is the hypothetical chemical element with symbol Uue and atomic number 119. Ununennium and Uue are the temporary systematic IUPAC name and symbol respectively, which are used until the element is discovered, confirmed, and a permanent name is decided upon.
Diamond is the hardest naturally occurring substance found on earth.