Who was the first to discover the idea of elements? What is the transfer of energy due to a difference in temperatures? What is a compound that consists of a ratio of negative and positive ions?

Name: Chemistry Study Guide for Mid-term 1 for Chapters 1-3
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Chapter 1:Matter and Energy 1. Atonism: All forms of matter are composed of atoms which are the smallest and most indestructible form 2. Antoine Lavoisier was the first to discover the idea of elements 3. All matter is composed of either a pure substance or is a mixture a. A Pure substance is either composed of a compound or the pure element itself. i. For example water is a compound which is a pure substance b. A mixture is broken down into either a homogeneous or heterogeneous substance. A substance is homogeneous if the substances within the mixture are distributed uniformly like in vinegar vs heterogeneously like in a salad 4. The scie