Can we make twenty flash cards on chemistry now.? Basic concepts

Okay, let's start with some basic chemistry flashcards! Here are a few to get us going:

Flashcard 1: Atom
An atom is the smallest unit of an element that retains the chemical identity of that element. It's made of a nucleus (containing protons and neutrons) and electrons orbiting around it.

Flashcard 2: Element
An element is a pure substance consisting only of atoms that all have the same number of protons in their atomic nuclei. Examples include Oxygen (O), Carbon (C), and Gold (Au).

Flashcard 3: Compound
A compound is a substance formed when two or more different chemical elements are chemically bonded together in a fixed ratio. Water (H₂O) and Carbon Dioxide (CO₂) are examples.