unit 1
What are the physical properties of a substance?
The physical properties of a substance are any of its features that can be observed or measured without altering the substances identity.
What does the word "kinetic" mean?
Dealing with motion.
What where the first known non metals?
Carbon, sulfur, arsenic.
What must a chemical equation reaction obey to be accurate?
The law of conservation of mass.
What is a mixture?
A combination of two or more substances that can be separated through physical means.
What two physical properties depend on sample size?
mass and volume.
What factors contribute to an objects kinetic energy?
Mass and velocity.
What where the first known metals?
Iron, copper, zinc, silver, gold, mercury, lead, tin, and antimony.
What number can be inserted into the front of the appropriate chemical formulas?
The coefficient.
What are the two types of heterogeneous mixtures?
Suspensions, and Colloids.
What is a physical change?
A physical change is a change that does not alter the identity of a substance.
What is the equation used to calculate kinetic energy?
KE=1/2mv^2
What year did the list increase to 61 known elements?
1861.
What does a synthesis reaction do?
It combines two or more reactants into one product.
What is a homogeneous mixture?
a mixture that contains substances that are evenly distributed.