Question

define Elements in brief. ​

Answer 1

Answer:

An element is a substance that is made entirely from one type of atom. For example, the element hydrogen is made from atoms containing a single proton and a single electron. If you change the number of protons an atom has, you change the type of element it is.

If you had very, very good eyes and could look at the atoms in a sample of hydrogen, you would notice that most of the hydrogen atoms would have no neutrons, some of them would have one neutron and a few of them would have two neutrons. These different versions of hydrogen are called isotopes. All isotopes of a particular element have the same number of protons, but have a different number of neutrons. If you change the number of neutrons an atom has, you make an isotope of that element.

Currently, scientists know of 118 different elements. Some, like gold, silver, copper and carbon, have been known for thousands of years. Others, such as meitnerium, darmstadtium and ununquadium, have only recently been created by scientists. All known elements are arranged on a chart called the Periodic Table of Elements.

Explanation:

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Answer 2

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An element is a substance which cannot be split up into two or more simpler substances by the usual chemical methods of applying heat, light or electric energy.

$\underline{ \underline \mathtt{examples ⇩}}$

Hydrogen is an element because it cannot be split up into two or more simpler substances by the usual methods of carrying out chemical reactions by applying heat, light or electricity. similarly, oxygen is an element because it cannot be broken down into simpler substances by chemical methods. on the other hand, water is not an element because it can be split up into two simpler substances, hydrogen and oxygen, by electricity.

$\underline{ \underline \mathtt{another \: defination \: for \: elements ⇩}}$

An element is a substance which is made up of only one kind of atoms.

$\underline{ \underline \mathtt{examples ⇩}}$

copper metal is made of only one kind of atoms called 'copper atoms', so copper Metal is an element.

there are 118 elements known at present, out of which 94 elements occur in nature, while the remaining 24 elements have been prepared artificially.

Every substance in this world is made up of one or more of these elements.

$\underline{ \underline \mathtt{some \: of \: the \: commom \: elements \: are \: ⇩}}$

Hydrogen, helium, oxygen, nitrogen, carbon, sulphur, phosphorus, chlorine, bromine, iodine, sodium, potassium, magnesium, calcium, aluminum, copper, silver, gold, zinc, iron, silicon, tin and mercury.