Working Like A Scientist
The method scientists use to smell something in the lab to avoid knocking themselves out
Wafting
Elements and compounds are examples of this.
Pure substance
Emission of light and odor production are both examples that this might be occurring
A chemical reaction/change
Law stating that matter cannot be created nor destroyed
Law of Conservation of Matter
Phrase that chemists use to describe which solvents describe which solute.
"Like dissolves like"
A measure of how close repeated measurements are to one another
Precision
The tool used to organize all known elements in the universe
The Periodic Table of Elements
Bond formed between atoms that unequally share electrons
Polar covalent bond
Most main group elements adhere to this rule that explains how many electrons an atom will gain or lose in an ionic bond
Octet Rule
Water is a "sticky" liquid that holds onto itself. This is called ________________.
Cohesion/surface tension
Name of the unit system most countries and all scientists use (examples include the mole, gram, and liter)
SI System
Type of mixture that appears the "same throughout"
Homogeneous mixtures (solutions)
Chemical formula for lead (IV) oxide.
PbO2
Current model of the atom that uses probability to explain spaces around the nucleus that electrons might be found.
The Quantum Mechanical Model of the Atom
This molecule/atoms lowers the activation energy of a reaction and speeds it up.
A catalyst
A proposed, evidence-based explanation for how a natural phenomenon works or why something occurs.
Scientific Theory
Solid, liquid, gas, and plasma are all examples of somethings's ____________.
state of matter/phases
Outer shell of electrons involved in the formation of chemical bonds.
Valence electrons
Unit used to describe the number of particles a sample of matter contains.
The mole (mol)
This moon of Jupiter is believed to be covered in a vast ocean beneath the ice.
Europa
A representation of a natural system or problem that scientists can use to simulate that system.
A model
Obsessive Russian scientist credited with the first iteration of the periodic table.
Mendeleev
Name the five types of chemical reactions
Single Replacement
Double Replacement
Synthesis
Decomposition
Combustion
These are responsible for physical properties like phase of matter and boiling point
Intermolecular Forces
These gastropods feature a coiled shell they can completely retract into.