Web4 May 2024 · And a molecule is a substance which is formed by the bonding of two or more identical / different atoms. For example, the substance Na (Sodium) is an atom (One type of atom). But the substance NaCl (Sodium Chloride) is a molecule since it is formed by the bonding of two different atoms, which are the atom Na (Sodium) and the atom Cl (Chlor). WebPure and Impure Substances • A pure substance contains only one type of element or compound. An impure substance contains more than one type of element or compound in a mixture, for example salt water contains NaCl and H …
Matter, elements, and atoms Chemistry of life (article) - Khan …
WebSome substances, like particles of this iron, contain only one kind of atom. Iron is an element. It is made of only one type of atom: iron atoms. Sulfur is another element. It... WebA compound is a substance that contains atoms of two or more different elements, chemically joined together. For example, water is a compound of hydrogen and oxygen, … touch screen feedback circle stuck
What Is a Substance Examples and Types - Study.com
WebAn element is a pure substance which contains identical atoms or molecules with only one type of atomic core. 2. A compound is a pure substance which contains identical molecules with two or more types of atomic core. 3. A mixture is a material which has two or more types of molecules. WebHydrogen gas (H2) is a molecule, but not a compound because it is made of only one element. Water (H2O) can be called a molecule or a compound because it is made of hydrogen (H) and oxygen (O) atoms. There are two main types of chemical bonds that hold atoms together: covalent and ionic/electrovalent bonds. WebA pure substance contains only one type of atom.-wrong A pure substance contains only one element or compound. A pure substance is always a compound. A pure substance contains only one element or compound. The atomic number of iron (Fe) is 26. What does this tell you about an atom of iron? The sum of protons and neutrons in an atom of iron is … touchscreen feedback