chemistry periodic table with names of elements

Special fan-and-vent systems are available that draw air from below the basement floor, before it can enter the living space, and vent it above the roof of a house.Īfter smoking, radon is thought to be the second-biggest preventable cause of lung cancer in the United States. Fortunately, specialized ventilation minimizes the amount of radon that might collect. Moreover, because it is denser than air, radon tends to accumulate in basements, which if improperly ventilated can be hazardous to a building’s inhabitants. Unfortunately, it is radioactive, and increased exposure to it has been correlated with an increased lung cancer risk.īecause radon comes from the ground, we cannot avoid it entirely. Because it is a noble gas, radon is not chemically reactive. Radon is an invisible, odorless noble gas that is slowly released from the ground, particularly from rocks and soils whose uranium content is high. Because certain properties of the elements repeat on a regular basis throughout the table (that is, they are periodic), it became known as the periodic table.

When elements were later discovered whose properties closely matched Mendeleev’s predictions, his version of the table gained favor in the scientific community. He left gaps in his table for what he thought were undiscovered elements, and he made some bold predictions regarding the properties of those undiscovered elements. Later that decade, Dmitri Mendeleev, a Russian chemist, organized all the known elements according to similar properties. In 1864, Julius Lothar Meyer, a German chemist, organized the elements by atomic mass and grouped them according to their chemical properties.

Likewise, lithium, sodium, and potassium react with other elements (such as oxygen) to make similar compounds. For example, chlorine, bromine, and iodine react with other elements (such as sodium) to make similar compounds. In the 19th century, many previously unknown elements were discovered, and scientists noted that certain sets of elements had similar chemical properties.

Chemistry periodic table with names of elements