Chemical changes happen when substances change at the molecular level. Here are some important points to understand:
Bonds Form and Break: When a chemical reaction happens, the connections between atoms break apart. Then, new connections are formed. This changes the way the molecules are arranged.
Conservation of Mass: In every chemical reaction, the total weight of what you start with (the reactants) is the same as the total weight of what you end up with (the products). This is called the Law of Conservation of Mass. You can think of it like this: the weight before equals the weight after (mReactants = mProducts).
Energy Changes: Chemical changes can either take in energy or give off energy. When they take in energy, it's called an endothermic reaction. When they release energy, it's called an exothermic reaction. This affects how the molecules interact and their stability.
In simple terms, chemical changes create new substances that have different qualities from what you started with.
Chemical changes happen when substances change at the molecular level. Here are some important points to understand:
Bonds Form and Break: When a chemical reaction happens, the connections between atoms break apart. Then, new connections are formed. This changes the way the molecules are arranged.
Conservation of Mass: In every chemical reaction, the total weight of what you start with (the reactants) is the same as the total weight of what you end up with (the products). This is called the Law of Conservation of Mass. You can think of it like this: the weight before equals the weight after (mReactants = mProducts).
Energy Changes: Chemical changes can either take in energy or give off energy. When they take in energy, it's called an endothermic reaction. When they release energy, it's called an exothermic reaction. This affects how the molecules interact and their stability.
In simple terms, chemical changes create new substances that have different qualities from what you started with.