Matter & Properties
Anything that has mass and takes up space
Matter
Ability to do work
Energy
SI unit for mass
Kilogram
Tiny, dense center of an atom
Nucleus
Horizontal rows on the periodic table
Periods
A substance made of only one type of atom
Element
Energy of motion
Kinetic energy
SI unit for length
Meter
Negatively charged particle
Electron
Vertical columns on the periodic table
Groups
Substance made of two or more elements in fixed ratio
Compound
Process of making observations and testing ideas
Scientific method
Metric prefix for 1/1000
Milli
Positively charged particle
Proton
Elements in column 1A
Alkali metals
Mixture with uniform composition
Homogeneous mixture
Energy stored in an object
Potential energy
0 °C in Kelvin
273.15o
Model with electrons orbiting nucleus like planets
Bohr model
Elements in column A8
Noble gases
Change that forms a new substance
Chemical change
Statement that describes what happens, not why
Scientific law
Formula for density
d = m/V
Atoms with same number of protons but different number of neutrons
Isotopes
Elements along the stair-step line
Metalloids