Elements are classified as set out in the Periodic Table of the elements. It is NOT clear to what "three" you are referring.
Ga, Sc and Ge were important to Mendeleev because these three elements have the same physical and chemical properties.
No other element has the exact same properties as sodium, but the three with the most similar properties would most likely be lithium, potassium, and rubidium.
Only elements(the substances found in the periodic table) are classified as either metals, non-metals or metalloid. Sugar is not an element, it is a covalent compound consisting of the elements Carbon, Hydrogen and Oxygen. Thus, sugar cannot be classified as any of the three.
johann dobereiner had contributed towards the base of the periodic table and discovered that the elements shared similiar properties because there always was three elementzs in three groups that he later refered to as Triads.
Three chemical elements make up the Iron Triad, iron (Fe), cobalt (Co) and nickel (Ni).These three elements are sometimes given the name Iron Triad because they have some similarities in properties and are located together in the Periodic Table.
How are elements classified
UMM... if you're asking how how are the elements classified into three parts, it's: 1) metal 2) nonmetal 3)metalloid
Division into three parts or elements or a system based on three parts or elements.
The 3 main categories are Metal, Nonmetals and Metalloids
its atomic number There are there properties of an element to mass. The three properties are density, melting and electrical.
These elements are: - radioactive - dangerous - rare - expensive
Magnesium, strontium , and barium belong to group 2A of the periodic table. These have two valence electrons in their outermost shell. So these three elements have similar chemical properties. But the other given elements do not lie in same group so they have different chemical properties.
The main three properties of the metals are malleability (you can shape it easily), ductility (you can turn it into a wire) and conductivity (it will carry heat and electricity very well).
Stratification has three elements. These three elements are property, power, and prestige. It can be predicted what part a person plays in a social hierarchy based on whether they have these elements and how they portray them.
Equilateral, Isosceles and Scalene are three types of triangles classified based on how many congruent sides the triangle has.
Three elements that have similar chemical properties to oxygen are sulfur, selenium, and tellurium. These elements belong to the same group as oxygen in the periodic table and have similar electron configurations, which influence their reactivity and chemical behavior. Additionally, they can form similar types of chemical bonds with other elements.
Chlorine, Bromine, and Iodine. They are all in the same periodic group.