1
Sand and salt mixed together
Mixture
Commonly known as SI
International System of Measurement
An element that has luster, conducts heat and electricity, and usually bends without breaking.
metal
Iron on the Empire State Building is an example of this.
Macroscopic view of matter
_________________ is an example of a halogen.
Chlorine
Describe the characteristics and behavior of matter.
Properties
The idea that matter is made up of fundamental particles called atoms.
Atomic Theory
Every bit of the matter being examined is the same substance.
Pure substance
The science that investigates and explains the structure and properties of matter.
Chemistry
Elements are arranged according to its _______________.
atomic number
The measure of the amount of matter that an object contains.
Mass
An observation made without measurement.
Qualitative expression of composition
A thinking device that helps you understand and explain macroscopic observations.
Scientific Model
The elements in a vertical column of the periodic table.
group
Lithium, sodium and potassium are known as ____________________.
alkali metals
An element that does not conduct electricity as well as a metal, but that does conduct slightly better than a nonmetal.
semiconductor
Matter with the same fixed composition and properties
Substance
Negatively charged particle
electron
An element with some physical and chemical properties of metals and other properties of nonmetals.
metalloid
Copper, silver, and gold are called the _________________.
coinage metals
When no net change occurs in the amount of reactants or products
equilibrium
The statement that the physical and chemical properties of the elements repeat in a regular pattern when they are arranged in order of increasing atomic number.
periodic law
Atoms are an example of this.
Microscopic view of matter
Anything that takes up space and has mass.
Matter
Green plants take in carbon dioxide and give off _____________ during photosynthesis.
oxygen