Unit 2 Vocab *bolded* Flashcards
Chemical Properties
Characteristics that describe how a substance reacts with other substances to make new substances
Ion
Atom or molecule that has a - or + charge
Isotope
atom with the same # of protons but a different number of neutrons as other atoms of the same element
Neutron
Neutral charge subatomic particle
Electron
- charge subatomic particle
unified atomic mass unit (u)
unit of measure for the mass of subatomic particles
physical properties
characteristics that can be observed without changing the substance
Atomic #
The # of protons in the nucleus of an atom
Proton
+ charge subatomic particle
Mass #
the sum of the # of protons and neutrons in an atom
Fracture
The way in which a mineral breaks along irregular or curved surfaces
Streak
The color of a mineral in powdered form
radioactivity
the decay of a mineral’s unstable atomic nuclei over time
Density
the ratio of mass to volume in a substance
Magnetism
the ability of a mineral to attract iron
chatoyancy
the cat’s-eye effect in minerals
cleavage
the tendency of a mineral to form smooth, flat surfaces along breaks
fluorescence
the ability of a mineral to glow under ultraviolet light
luster
the way in which a mineral reflects light
asterism
the appearance of a six-sided star shape when a mineral reflects light
Matter
anything that has mass and takes up space
element
a substance that cannot be separated or broken down into simpler substances by chemical means
Atom
smallest unit of an element that maintains the chemical properties of that element
Periods
horizontal rows on the periodic table