Matter & Measurement
This term describes anything that has mass and occupies space.
What is matter?
This state of matter has a definite shape and volume.
What is a solid?
This particle has a negative charge.
What is the electron?
Group 1A elements are known as these.
What are alkali metals?
A negatively charged ion.
What is an anion?
A homogeneous mixture has this characteristic.
What is uniform composition?
This phase change is solid → gas.
What is sublimation?
The atomic number equals the number of these in the nucleus.
What are protons?
These elements are unreactive and found in Group 8A.
What are noble gases?
Oxygen typically forms this charge as an ion.
What is 2–?
The SI unit for amount of substance.
What is the mole?
Air is considered this type of mixture.
What is a homogeneous mixture?
Millikan’s oil drop experiment measured this property of the electron.
What is its charge?
Elements along the zig-zag line are called this.
What are metalloids?
The ion NH₄⁺ is known as this.
What is ammonium?
A physical change does not alter this aspect of a substance.
What is chemical composition?
The most compressible state of matter.
What is gas?
Rutherford’s gold foil experiment proved atoms have this structure.
What is a dense nucleus?
Group 7A elements are known for high reactivity.
What are halogens?
Group 1A metals always form ions with this charge.
What is +1?
This type of property does not depend on sample size (e.g., density).
What is an intensive property?
Distillation separates liquids based on differences in this property.
What is boiling point?
Atoms of the same element with different numbers of neutrons.
What are isotopes?
These elements tend to lose electrons and form cations.
What are metals?
The simplest whole-number ratio of atoms in a compound.
What is the empirical formula?