A chemical element is a substance that cannot be broken down by chemical means and is composed of only one kind of atom. A chemical element is a chemical substance consisting of a single type of an atom distinguished by its atomic number. The atomic number represents the number of protons contained in the atom.
any of the more than 100 known substances (of which 92 occur naturally) that cannot be separated into simpler substances and that singly or in combination constitute all matter.
chlorine, gold, potassium, calcium, etc. Can be found on Periodic Table.
Elements are substances made up of only one type of atom. This means that they consist of atoms all with the same number of protons. The number of neutrons, however, can vary within an element; this is called isomerism.
If you are asking what an element is, it is a pure substance that can't be broken down by physical or chemical means. hope that helps! : )
An element is a group of atoms of all the same type.
It's also considered a pure substance which is the same as what was previously answered
An element is a substance consisting of atoms which all have the same number of protons and they cannot be broken down into anything simpler
A chemical element is a substance made up of only one type of atom, and distinguised by its atomic number (the number of protons in its nucleus).
h20 is not an element. because it has hydrogen and oxygen in it.therfore it is a compound.
Boron family is group IIIA so 3 electrons are in the outermost shell.
The random motion of small particles in the air is called Brownian motion (named after the botanist Robert Brown). This motion is caused by the collisions of the particles with the molecules of the gases making up the air.
There are two types of replacements in Chemistry. There are single and double replacements. A single replacement is when an element replaces another element within a compound, but in order for this reaction to occur the elemet that is being replaced must be less active than the element that is being replaced. This can be determined using an activity series. A double replacement is when two compounds switch their elements: NaF + AuCl --> NaCl + AuF. (This reaction may not actually occur, it is just a demonstration of how the elements replace eachother). Finally, within these reactions if pure water (H2O) is formed the reaction is classified as a neutralization and a no reaction. !
White phosphorus was once used but due to the health effects on workers (phossy jaw) was discontinued. Modern strike anwhere matches have phosphorus sesquisulfide, P4S3. Safety matches have red phosphorus on the box, and potassium chlorate in the head.
none because it is not a elemet
how did it get its name
element
Krypton is an element.
Mercury.
3
Atoms are in any elemet
Elemet
Elemet
Compound because it has more then one element in it.
h20 is not an element. because it has hydrogen and oxygen in it.therfore it is a compound.
It is when the molecule of a certain element only contains one atom of that elemet.