How many significant figures are there in 4500?
2
What subatomic particle is found in the nucleus and has a positive charge?
The proton
Write the name for the following compound: CaS
Calcium Sulfide
What type of chemical reaction is this:
2H2O2→2H2O+O2
Decomposition
What is the 2nd smallest planet in our solar system?
Mars
What is the name of this equipment?
Beaker Tongs
Explain the trend for atomic radius as you move left to right across the periodic table.
Atomic radius decreases.
Why do atoms gain/lose electrons?
To become stable!
Is Cs2S soluble?
Yes.
What is the main gas found in air?
Bonus points: What % does it make up?
Nitrogen (78%)
What is the correct measurement reading?
29.3 - 29.7
Identify a common characteristic shared by halogens.
Highly reactive & toxic gasses, 7 valence electrons, high electronegativities, etc.
Balance the following equation:
CH4 + O2 -> CO2 + H2O
CH4 + 2O2 -> CO2 + 2H2O
Give an example of a heterogenous and homogenous mixture.
Varies
What number does this roman numeral represent: XCIV?
94
Identify the lab equipment used to measure liquids with high precision.
Graduated Cylinder
Choose an element from the alkaline earth metals, and provide its: atomic number, chemical symbol, and the charge it forms when bonding ionically.
Varies
Write the formula for the following compound: FeF2
Iron (II) Fluoride
Identify the solute and solvent in a glass of iced tea.
Solute: Ice Cubes
Solvent: Tea
What type of life form is the most populous in the world?
Insects (10 quintillion!)
How is accuracy different than precision?
Accuracy is how close results are to the true or known value, while precision is how exact a value is.
What is the net charge of an ion that has 20 protons, 21 neutrons, and 18 electrons?
+2
Write the chemical formula for the compound formed between aluminum and nitrate.
Al(NO3)3
What are my reactants and products in a combustion reaction?
Fuel(Hydrocarbon) + O2 -> H2O + CO2 + Heat
Before BPHS was a high school, the building was used as a ______.
Catholic School