sciencebeginner
Chemistry Fundamentals
Master basic chemistry concepts including atoms, molecules, and chemical reactions
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Card 1
What is an atom?
The smallest unit of matter that retains the properties of an element, consisting of protons, neutrons, and electrons.
Card 2
What is the difference between an element and a compound?
An element is a pure substance made of one type of atom. A compound is made of two or more different elements chemically bonded together.
Card 3
What is the pH scale?
A scale from 0-14 that measures acidity and alkalinity. pH < 7 is acidic, pH = 7 is neutral, pH > 7 is basic/alkaline.
Card 4
What is a chemical bond?
A force that holds atoms together in a molecule or compound. Main types: ionic (electron transfer), covalent (electron sharing), and metallic.
Card 5
What is the difference between a physical and chemical change?
Physical change alters form but not composition (ice melting). Chemical change creates new substances (wood burning).
Card 6
What is the periodic table?