Content Quiz 1 + 2
What is the formula to the outer rings to a bohr model?
2n2
What is a homogeneous mixture?
A homogeneous mixture is a mixture that has the same consistancy throughout.
Which shows the amount of the molecule? A. subscripts or B. superscripts
B
What is a catalyst?
It is something that speeds a chemical reaction.
What are isotopes?
atoms with a different number of neutrons
What are chemical bonds and the three types?
Chemical bonds is the force of attraction from ions or atoms. The three types are ionic, metallic, and covalent
What are enzymes?
Enzymes are catalysts for living organisms.
Define reactants and products and how they differ.
Reactants are at the start of a chemical reaction. Products are the result of a chemical reaction. Reactants are written on the left side however products are written on the right in a chemical equation.
What is the difference between a compound and molecule?
A molecule can be a compound but a compound cannot be a molecule. Molecules consist of 2 or more of the same atom yet compounds can be made of multiple different elements.
What are ionic bonds?
Ionic bonds are bonds between oppositely charged ions
What are characteristics of exothermic and endothermic reactions?
Exothermic reactions produce energy, typically through light and fire. The products are warmer in temperature. Whereas endothermic absorbs energy producing a colder product. The reactants are warmer than the products.
What are the characteristics of bases?
Bases are bitter, don't react with metals, and produce hydroxide ions when dissolved in water.
If an atom's amount of electrons decreases does it produce A. cations or B. anions?
A. cations
What are covalent bonds?
bonds between non-metal atoms that share two electrons
Name three signs of a chemical reaction occurring.
precipitate, color change, and gas forming (Answers may vary)
Which produces hydroxide ions (OH-) and which produces hydrogen ions (H+) when dissolved in water?
Acids produce hydrogen ions and bases produce hydroxide ions.
What is the kinesthetic and law of conservation theories of matter?
The kinesthetic theory of matter is that all matter consists of constantly moving particles. The law of conservation theory of matter is that matter cannot be produced or destroyed, only rearranged.
What does ionic bonds produce?
Crystals
What are the five types of chemical reactions?
Synthesis, Decomposition, Single Replacement, Double Replacement, and Combustion.
What is a precipitant?
A precipitant is an insoluble solid white substance formed from a chemical reaction.