Chemical Equations
This is how we read the arrow in a chemical equation.
What is "yields" or "reacts to form"?
This type of reaction forms a larger product from smaller products by putting together the atoms into a larger molecule.
What is a "composition" or "combination" or "synthesis" reaction?
A bond forms when these particles (be specific) in the atom's outermost energy levels are shared or transferred.
What are valence electrons?
These are the chemicals present at the beginning of a chemical reaction.
What are the reactants?
This type of mixture has the same appearance in all parts.
What is a homogeneous mixture?
These are the chemical substances present at the end of a chemical reaction.
What are the products.
This type of reaction is the opposite of a synthesis reaction.
What is a decomposition reaction?
This type of bond involves one atom becoming positively charged, while the other atom becomes negatively charged.
What is an ionic bond?
In a chemical reaction, the old _____ break and new ones form.
What are bonds.
This type of mixture is exemplified by the air in this classroom?
What is a homogeneous mixture?
These numbers cannot be changed in a chemical reaction.
What are the subscripts?
In a combustion reaction, these are the two products.
What are water and carbon dioxide?
This type of bond has free electrons, which means that materials held together by this kind of bond will be shiny, and good conductors.
What is a metallic bond?
This law tells us that the number of atoms before and after the reaction must be the same.
What is the law of Conservation of Matter?
This phenomenon causes light to scatter off of small particles, and can let you tell a solution from a colloid.
Balance the equation:
___CaCl2 + ___Na2CO3 --> ___CaCO3 + ___NaCl
The coefficients are:
1, 1, 1, 2 (in that order).
What is a single replacement reaction?
This type of bond holds together ammonia, the chemical with formula NH3.
What is a covalent bond?
In a reaction the total number of these particles does not change.
What are atoms?
In a mixture made from 30 g of water dissolved with 90 g of sugar, the water has this role in the solution.
What is the solute?
This type of substance is sometimes symbolized with a down arrow in a chemical reaction.
What is a precipitate?
In our types of reactions lab, this compound, which makes up limestone, formed when calcium chloride reacted with sodium carbonate and formed a precipitate.
What is calcium carbonate?
This name is used for the diagrams that show the arrangement of electrons in a covalent bond?
What are Lewis (dot) diagrams?
This type of chemical reactions releases energy, causing the surroundings to warm up.
What is exothermic?
What is 10%?