- The document discusses atoms, ions, molecules, elements, compounds, and chemical formulas and reactions.
- Atoms combine to form molecules, and molecules made of the same type of atom are elements, while molecules with different atom types are compounds.
- Chemical formulas use symbols and subscripts to represent the elements and number of each type of atom in a molecule or compound.
- Chemical reactions can release or absorb energy and are classified as exothermic or endothermic respectively.
Powerful Google developer tools for immediate impact! (2023-24 C)
Atomsandmolecules 100919202417-phpapp02
1. Do NOT make an ATOM an ION unless it tells you too! THIS MEANS- Do NOT make an ATOM stable unless it tells you to do so . To determine the charge of a picture of an atom look at the number of protons and electrons in the picture and determine the charge. (Examples are on the next slide.)
2. Review: What is the charge of this ATOM ? Just use the number of protons and electrons that are given .
3. What is the charge of this ATOM? Just use the number of protons and electrons that are given. -2
4. We will discuss: Chemical Symbol Atoms Elements Bonds Compounds Molecules Chemical Formulas Endothermic Reactions Exothermic Reactions
9. Molecules form when atoms join Element Compound There are two types of molecules
10.
11. Molecules Element H 2 If all atoms in a molecule are alike, then the molecule is classified as an _______________. ELEMENT
12. Molecules form when atoms join Compound The other type of molecule is a compound. Do you think that the atoms joined together in a compound are all the same? NO! The atoms are different.
