Atomic Structure
Which particle has a negative charge?
Electron
Which pair forms an ionic bond?
Na and Cl
0.005 written in scientific notation equals?
5 × 10■³
Law of Multiple Proportions explains what?
Different ratios possible
What does increasing temperature during reaction suggest?
Energy released
An element is identified by which particle number?
Protons
What describes covalent bonding?
Electron sharing
How do you convert Celsius to Kelvin?
°C + 273
Mass before and after reaction stays same. What law applies?
Law of Conservation of Mass
Why balance chemical equations?
To conserve atoms
If carbon has atomic number 6 and mass number 14, how many neutrons does it have?
8 neutrons
Ionic compounds typically have what melting points?
High melting points
What affects weight but not mass?
Gravity
Temperature increases during reaction indicates what?
HINT: EXO or ENDO
Exothermic reaction
Why use SI units?
Universal consistency
Where is most atomic mass located?
Nucleus
Covalent compounds are often what state?
Gases or liquids
Law of Definite Proportions states what?
Fixed ratios
Compound with 2 hydrogen atoms for every oxygen atom formula?
H2O
What does a constant temperature suggest?
Reaction stopped/equilibrium
What must be equal in a balanced equation?
Equal atoms on both sides
Example of a chemical change?
Iron rusting
Covalent bonds occur between which type of elements?
a non-metal and a non-metal
Atoms during reactions are rearranged or destroyed?
Rearranged
Why analyze experimental data tables?
Interpret reaction trends
Why do we use parentheses to indicate multiple molecules of a polyatomic ion? Ex. Is (CO3)2 the same as CO3 2 ?
Without parentheses it is unclear if we're referring to 32 molecules of CO3 OR 2 molecules of CO3
Determine the formula for the following compound:
Titanium IV Carbonate
Ti(CO3)2
Determine the formula for the following compound:
Nonaboron Monooxide
B9O
Name the following covalent compound
PCl
Phosphorus Monochloride
Which types of compounds are typically electrical insulators and have low melting and boiling points
Covalent compounds