Elements
best electrical conductor
what is silver
Kool Aid or ice tea
what is a homogenous mixture
charcoal
What do you make if wood is burned without much oxygen?
particles vibrate about a fixed point
The chemicals on the right side of the arrow are known as
What are the products?
semiconductive material found in sand
what is sand
chicken noodle soup
what is a heterogeneous mixture
lime
what does heating limestone make
what is a gas?
The temperature at which a solid becomes a liquid and is used to identify a substance
What is the melting point?
Most abundant element in the earths crust
what is oxygen
copper, phosphorus, lead
what is an element
ethanol
what do sugar water and yeast make
indefinite volume and indefinite shape
what is a gas
When energy flows from the system to the surroundings
What is an exothermic reaction
element used for galvinizing metal
what is zinc
H2O, CO2, C12H22O11
water and carbon dioxide
what are the typical products of a combustion reaction
particles are free to move past each other but attractive forces hold them close to each other
what is a liquid?
Compounds always exist in a fixed and constant ratio
What is the law of constant composition (law of definite proportions)
used to make the "king of chemicals"
what is sulfur
Carbon, water, and salt are each examples of
what is a pure substance
metal
what you often get when an ore is heated with carbon
These two states of matter cannot be compressed much
graphite, coal, and diamonds are all forms of carbon
what is an allotrope?