Question

1. Define atom and molecules.
2. Difference between an element and compound.​

Answer 1

Answer:

1. Atom-The atom is the smallest object that retains the properties of an element. Atoms are composed of electrons and a nucleus. The nucleus contains protons and neutrons. All atoms are electrically neutral, because every atom has an equal number of electrons and protons.

molecules-the smallest unit into which a substance can be divided without changing its chemical nature

2. element-A chemical element is a species of atom having the same number of protons in their atomic nuclei. For example, the atomic number of oxygen is 8, so the element oxygen consists of all atoms which have exactly 8 protons

compound-A compound is a substance formed when two or more chemical elements are chemically bonded together