Atoms of elements in group 18 (noble gases) do not easily combine with other elements to form compounds.
One of the best ways to describe John Dalton's observations of elements is that they are made of small particles. The atoms join in simple whole number ratios when the elements react.
There are very many elements which will do that.
== == When metals react with other elements, the atoms of the metals give up their valence electrons.
If the elements are mixed, but do not react, this is a mixture, or possibly a solution.If the substances chemically react to form a new substance, then it is a chemical reaction, and the substance created (through chemical bonding) is a compound.The smallest unit of a compound is a molecule, which consists of two or more atoms in a specific arrangement.(Molecules can also be made of one element, and are called allotropes.)
because they are chemically joined together and it is difficult to separate them
They form a compound.
== == When metals react with other elements, the atoms of the metals give up their valence electrons.
== == When metals react with other elements, the atoms of the metals give up their valence electrons.
Atoms of non-metals usually gain or share electrons when they react with other atoms.
When 2 or more elements react together, they can form a compound. A compound is a substance made of two or more different elements that are chemically bonded together. The elements combine to create a new substance with unique properties.
== == When metals react with other elements, the atoms of the metals give up their valence electrons.
== == When metals react with other elements, the atoms of the metals give up their valence electrons.
The building blocks of a compound are atoms. Atoms combine together to form molecules, which in turn make up compounds. The specific types of atoms and how they are bonded together determine the properties and characteristics of the compound.
== == When metals react with other elements, the atoms of the metals give up their valence electrons.
Atoms of elements in group 18 (noble gases) do not easily combine with other elements to form compounds.
Two elements will form a compound when they react chemically to bond together and create a new substance with different properties from the original elements. This usually occurs when the elements have a tendency to gain, lose, or share electrons to achieve a more stable electron configuration.