The Black Death was an outbreak of bubonic plague that lasted from about 1347 to 1352. The first cures of bubonic plague did not happen until effective antibiotics were develo â¦ ped in the 20th century. Throw sweet smelling herbs onto the fire to clean the air. 2  Carry pockets of sweet-smelling herbs. 3  Plague-proofing homes by putting glazes over southern windows to block the polluted southern wind. 4  Sit in a sewer so the bad air of the plague is driven off by the even worse one of the sewer.
Chemical element. A chemical element or element is a species of atoms having the same number of protons in their atomic nuclei (i.e. the same atomic number, or Z). There are 118 elements that have been identified, of which the first 94 occur naturally on Earth with the remaining 24 being synthetic elements.
The periodic table is a tabular arrangement of the chemical elements, ordered by their atomic number (number of protons in the nucleus), electron configurations, and recurring chemical properties. The table also shows four rectangular blocks: s-, p-d- and f-block.he number of possible elements is not known. A very early suggestion made by Elliot Adams in 1911, and based on the arrangement of elements in each horizontal periodic table row, was that elements of atomic weight greater than 256Â± (which would equate to between elements 99 and 100 in modern-day terms) did not exist.