Chemistry Study Guide. 1. What makes up an atom? Atoms are made of protons, neutrons and electrons.
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Transcript of Chemistry Study Guide. 1. What makes up an atom? Atoms are made of protons, neutrons and electrons.
Chemistry Study Guide
1. What makes up an atom?
• Atoms are made of protons, neutrons and electrons
2. How is an atom and element related?
• An atom is the smallest unit of an element and an element contains atoms that are all identical.
3. What is a chemical reaction and how are reactants and products involved?
• A substance is changed into one or more new substances. Reactants combine to form products.
4. What is an ionic bond?
• An ionic bond is when one ore more electrons are transferred to another atom. The change in the atoms’ charges cause the ions to be attracted.
5. What is a covalent bond?
• A covalent bond is when one or more electrons are shared.
6. What does organic chemistry mean?
• Organic chemistry is the chemistry of carbon and life.
7. What is the chemical formula for water?
• The chemical formula for water is H2O.
• Draw the structure of a water molecule.
8. What is polarity and explain how water is a polar molecule.
• A polar molecule has a slightly positive charge at one end and a slightly negative charge at the other end.
• Water is slightly negative around the oxygen and slightly positive near the hydrogens.
9. What is a hydrogen bond and what causes it?
• A hydrogen bond is when a hydrogen molecule is attracted to a slightly negative atom.
10. What is cohesion?
• Cohesion is when similar molecules are attracted to each other.
• Water molecules are attracted to other water molecules.
11. What is adhesion?
• Adhesion is when different molecules are attracted to each other.
• Water molecules are attracted to other molecules.
12. What is a solution?
• A solution is a mixture where a solute is dissolved in a solvent.
13. What is a solute?
• A solute is a substance the is dissolved in a solvent.
14. What is a solvent?
• A solvent is a substance that dissolves another substance.
15. What is an acid?• Acids are substances that are proton donors
(hydrogen ions) or electron acceptors • Have a pH between 0 and 7• Vinegar, Lemon Juice and stomach fluids.
16. What is a base?
• A base is a substance that is a proton acceptor (hydrogen ions) or electron donor.
• Has a pH between 7 and 14• Tums, Soap and Ammonia
17. What is a pH Scale?
• A pH scale shows how acidic or basic an substance is based on a concentration of hydrogen ions.