Oct 24, 2025 · Helium, chemical element, inert gas of Group 18 (noble gases) of the periodic table. The second lightest element, helium is a colorless, odorless, and tasteless gas that …

This is an interactive periodic table of the elements showing their atomic weights, atomic numbers, electron configurations, and state at room temperature.

Nov 12, 2025 · There are 118 elements on the periodic table. The elements are arranged in order of increasing atomic number, which is the number of protons in that atom’s nucleus. Hydrogen, …

Oct 20, 2025 · There are 118 elements on the periodic table. The elements are arranged in order of increasing atomic number, which is the number of protons in that atom’s nucleus. Hydrogen, …

ELEMENT meaning: 1 : one of the basic substances that are made of atoms of only one kind and that cannot be separated by ordinary chemical means into simpler substances; 2 : a particular …

Oct 27, 2025 · There are 118 elements on the periodic table. The elements are arranged in order of increasing atomic number, which is the number of protons in that atom’s nucleus. Hydrogen, …

Nov 8, 2025 · Copper, a chemical element that is a reddish, extremely ductile metal and an excellent conductor of electricity and heat. The pure metal is second only to silver in thermal …

Sep 27, 2025 · Bromine, chemical element, a deep red noxious liquid, and a member of the halogen elements, or Group 17 of the periodic table. Natural salt deposits and brines are the …

Nov 12, 2025 · carbon (C), nonmetallic chemical element in Group 14 (IVa) of the periodic table. Although widely distributed in nature, carbon is not particularly plentiful—it makes up only …

Oct 17, 2025 · A chemical element is any substance that cannot be decomposed into simpler substances by ordinary chemical processes. Elements are the fundamental materials of which …