Units 1&2
Units 5&7
Units 3&6
Units 9&10
Units 11&15-13&14
100
The mass of the atom is contained in the relatively small nucleus
What is protons and neutrons have more mass than electrons?
100
Least reactive group of elements on the periodic table
What are the noble gases? or What is group 18?
100
Lewis dot structure for a water molecule
what is a bent shape?
100
A researcher needs to combine 500 mL of two reactants for an investigation. However, the reaction is strongly exothermic and tends to damage equipment when the reactants are simply mixed together. To keep the reaction from damaging equipment, this is the BEST way to modify the reaction process
what is slowly add one of the reactants to the other inside the equipment?
100
In a chemical reaction this allows the reactants to form from the activated complex.
what is the activation energy?
200
This part of the atom creates most of the atoms volume
What is an electron?
200
The elements He, Ne, and Ar have this in common
what is an outer orbital full of electrons?
200
This property of water allows it to dissolve many different substances.
What is a polar molecule? What is polarity?
200
There are endothermic reactions and exothermic reactions, baking bread represents.....
what is an endothermic reaction?
200
This range on the pH scale includes acid rain
what is 4-6?
300
Thomson's contribution to the atomic theory
What is electrons and equal numbers of positive charges exist?
300
These coefficients balance the equation for the complete combustion of propane:
_C3H8+_O2 -> _CO2+ _H2O
what is 1, 5, 3, 4?
300
The chemical formula for chromium(VI) sulfate
Cr(SO4)3
300
Scientists developed a device capable of lowering temperatures in order to slow molecular motion to almost a complete stop. This temperatures is theoretically able to make this happen
what is 0 k?
300
Products purchased from grocery stores are dated and need to be used within a certain amount of time. This is to protect consumers from the effects of food spoilage. This process helps to slow the spoilage of food products
what is decreasing the storage temperature of the product?
400
The charge of this particle
what is a neutral charge?
400
One of these indications as shown in the picture represents that vinegar and baking soda reacts chemically.
What are gas bubbles? or What the product is a gas?
400
Name of the compound of this chemical formula (NH4)3PO4
what is ammonium phosphate?
400
temperature is a measurement of this type of energy
what is kinetic energy?
400
When adding sugar to tea, it was observed that the sugar kept dissolving. When ice was added, some sugar precipitated to the bottom of the glass. The mixture is then considered to be
what is saturated?
500
This happens when sodium chloride(NaCl) is dissolved in water (H2O) and ionizes.
What is NaCl crystals separate into positively- and negatively-charged particles?
500
X + ZY -> XZ + Y represents one of the various types of chemical equations
what is single replacement?
500
The chemical formula of a phosphate ion
what is PO43-
500
The arrangement of atoms of a substance changes during this process
What is a phase change?
500
This has the greatest effect on the dissolving of a solid solute in a liquid solvent
what is increasing temperature? or what is addign heat?