Atoms & Elements
Who created the first periodic table?
Dmitri Mendeleev
Two or more elements chemically combined form a ___.
Compound
Evenly mixed mixture = ___.
Solution (homogeneous)
What is density’s formula?
Mass ÷ Volume
What reaction uses electricity to split water?
Electrolysis
What is the atomic number equal to?
Number of protons
Bond formed by sharing electrons?
Covalent bond
Unevenly mixed mixture = ___.
Heterogeneous
Which state of matter has definite shape & volume?
Solid
What causes rust?
Corrosion (metal + oxygen)
Which particle has the least mass?
Electron
Bond formed by transferring electrons?
Ionic bond
What is the Tyndall Effect?
Scattering of light by colloids
What is viscosity?
Resistance to flow
What is sublimation?
Solid → Gas
How many electrons fit in the 3rd energy level?
18
What do we call a charged atom?
Ion
Large particles that settle over time are found in ___.
Suspensions
What happens at condensation point?
Gas → Liquid
What is the Kinetic Theory?
Matter is made of moving particles
What’s the term for atoms with different neutrons?
Isotopes
Prefix for 7 atoms in a molecule?
Hepta-
What’s the universal solvent?
Water
As energy increases, density ___.
Decreases
Order of energy levels by capacity (1–4)?
2, 8, 18, 32