The Periodic Table?! Hi everyone, welcome back today we will be talking about the periodic table! The Periodic Table is all about all the elements such as helium, hydrogen and titanium! The periodic table helps scientists to quickly refer to information about an element, like atomic mass and chemical symbol!
The periodic table has about 118 elements and most of those 118 elements are most likely metal. The periodic table is a chart that arranges the chemical elements in a useful, logical manner. These elements are listed in order of increasing atomic number, lined up so elements that exhibit similar properties are arranged in the same row or column as others.
Believe it or not, the founder of the modern periodic table is Dmitri Mendeleev, a russian chemist that created the modern periodic table. His table was just the first to gain scientific credibility. But it wasn’t just the first table that organised the elements according to periodic properties believe it or not. This founder created the framework that then became the modern periodic table, and this founder had left gaps for elements that have not been discovered yet and soon to be discovered in 1869.
Now we fast forward 1 year where this German chemist Lother Meyer produced a version of the periodic table similar to Dmitri Mendeleev in 1870. He left gaps for undiscovered elements but soon to his head he never predicted their properties. Then here comes the royal society of London awarded the Davy medal in 1882 to both Mendeleev and Meyer. The later discovery of elements predicted by Meneleev, including gallium (1875), scandium (1879) and germanium (1886), verified his predictions and his periodic table won universal recognition. In 1955 the 101st element was named mendelevium in his honour
The concept of subatomic particles did not exist in the 19th century. In 1913, English physicist Henry Moseley used X-rays to measure the wavelengths of elements and correlated these measurements to their atomic numbers. He then rearranged the elements in the periodic table on basically the basis of atomic numbers. This then helped explain disparities in earlier versions that used atomic masses!
The existing periodic table that holds about 118 elements aren’t ordered by discovering them or by atomic numbers. Scientists are working on creating and confirming elements 119 and 120, this will then change the appearance of the table.
Many people have known elements such as gold and carbon since ancient times. But these types of elements couldnt be changed using any type of chemical method. Because each element as you might know carries an unique number of protons the atoms have. For example if you were to mix silver and iron, you wouldn’t know how many protons are there. But however, you can tell the elements apart because they have different properties. You then might notice that there are more similarities linking iron and silver than between iron and oxygen. Then at the same time could there be a different way to organise the elements so you tell at a glance which ones had very similar properties.