Because they are natural elements of earth.
Elements of the periodic table
The periodic table has, what are called, elements. Elements are substances made up of only one type of atom.
Chromium, Molybdenum, Tungsten and Seaborgium are all in group 6 of the periodic table. They are all classified as metallic substances. They are all solids a 298 K.
Periodic table comprises of elements. These are arranged in groups and periods.
A Periodic table The Periodic Table of the Elements.
cannot be broken down into other substances
Elements of the Periodic Table
the periodic table
Elements of the periodic table
most elements in the peiodic table are classified as metalloids
The vast majority of elements in the periodic table can be classified as metals. Metals make up the s-block, d-block, and f-block of the periodic table. There are even a few elements in the p-block with metallic properties called metalloids.
Periodic table lists elements, not substances like eggs.
All of the substances found in the Periodic Table are considered as elements. None others are.
Metalloids
Periodic table can be classified as:MetalsTransition elementsNon-metalsThey occupy different groups.
The periodic table has, what are called, elements. Elements are substances made up of only one type of atom.
Chromium, Molybdenum, Tungsten and Seaborgium are all in group 6 of the periodic table. They are all classified as metallic substances. They are all solids a 298 K.