It's valence shell (outermost shell of atom) is full and stable.
yeah it is
If you mean compounds instead of combines, the answer is yes.
they change!!
Compounds
Atoms are the building blocks of all matter. Atoms are the most basic units of an element that have the properties of that element. Atoms of elements combine to form molecules, which can be molecular compounds, and atoms of elements can combine to form ionic compounds, as well. Compounds contain atoms of two or more elements chemically combined.
they share electrons
No. Molecules are made of atoms, not the other way around. Atoms of different elements combine to form compounds.
Yes, atoms from different elements can combine to form molecules or compounds. This occurs when atoms share electrons or transfer electrons to achieve a stable electron configuration. The resulting compound may have different properties from the individual elements.
The chemical properties of atoms are significantly changed when they form compounds. When elements combine to form compounds it is called a chemical reaction. The compound is then a collection of molecules and each molecule has are still the same atoms as one started with, but the arrangement of the electrons in the atoms has changed.
All the compounds existing in the universe are formed.
John Dalton
Atoms of elements combine to form compounds. A chemical compound is a pure chemical substance consisting of two or more different chemical elements that can be separated into simpler substances.