Well, darling, elements with names ending in "ium" are usually metals, and they're as common as wrinkles on a raisin. But if we're talking about elements with atomic numbers less than 101, then there are 8 elements with names ending in "ium." So, to answer your question, there are 8 elements under atomic number 101 that have names ending with "ium."
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There are 15 elements with atomic numbers below 101 that have names ending in -ium. These elements are typically metals and include lithium, sodium, potassium, calcium, titanium, chromium, and many others. The -ium suffix is commonly used for naming metallic elements in the Periodic Table.
There are two elements with atomic number less than 101 that have names ending with -ium: uranium (U, atomic number 92) and thorium (Th, atomic number 90).
39 from main table
+ all 14 lanthanides
+all 14 actinides (but looking for elements<101 so, only 11)
Hence, 64/100 elements with names ending in -ium.
All of the elements have German names when writing or speaking in German. However, only one element has an international atomic symbol derived from its German name: That is tungsten, for which the German name is Wolfram and the atomic symbol is W.
Every element on the periodic table is made of a number of protons and neutrons in the center with electrons around them. What makes one element different from another is the number of protons it has. The number of protons an element has is equal to that element's number on the periodic table.So, for example, Helium, which is element #2, has two protons. Oxygen, element #8, has 8 protons.The element's number that is also its number of protons is the small whole number located above the element symbol. E.g. 8 is written above O for oxygen. (The larger decimal number below the element symbol is something different, the average mass of the element.)
The periodic table lists the elements by their names and atomic symbols. For example, hydrogen is represented by the symbol H, and carbon is represented by the symbol C. Each element has a unique name and corresponding symbol on the periodic table.
Mendeleev's periodic table was organized based on atomic mass, while the modern periodic table is organized based on atomic number. The modern periodic table also includes elements that were not known during Mendeleev's time and has been expanded to include more elements.
In total there are 118 elements known or predicted to exist, and they appear on the modern Periodic Table.Only 114 of the elements are named, having been fully authenticated by isolation, or by detection of decay products. The others are given provisional (numerical) names with their atomic number, but no atomic weight. Around 98 elements occur naturally in one or more isotopes, and about 28 have to be synthetically produced (man-made).