Matter
What are the 3 main states of matter?
Solid, Liquid, Gas
What is a atomic Number?
The number of protons in a atom
What number tells you the number of protons and electrons?
Atomic Number
a chemical formula of a compound that gives the proportions of the elements present in the compound?
What is the empirical formula?
A measure of the disorder or randomness of particles that make up a system?
What is entropy?
What Is matter?
Anything with mass and volume
Mass Number is not on the _____?
Periodic Table
How do you figure out the number of neutrons?
Subtract the atomic number from the atomic mass
Percent composition of nitrogen in NH3
What is 82.4%
The common unit for energy
Joules
What are Mixtures?
Can be separated by chemical means
What is a Isotope?
Atoms of the same element with different number of neutrons
How do you find an element's atomic mass?
Add the number of neutrons and the number of protons together
TRUE OR FALSE
An empirical formula is always the same as the molecular formula?
False!
A substance that increases the of a chemical reaction without undergoing any permanent chemical change
Catalyst
Definition of a Solid?
Fixed Volume and shape
True or False, not every single element has a name and a symbol?
How many liquids are on the periodic table?
2
65.45% C, 5.45% H, 29.10% O; mol. wt. = 110
C6H6O2
Place where energy is stored for molecules
a chemical bond
What are 2 physical Properties of matter?
Density and Conductivity
A neutral atom has the same amount of ____ and ____?
Protons and electrons
What does the term 'valence electrons' mean? (2 things)
number of electrons on outermost shell, tells how reactive an element is
Caffeine has the following composition: 49.48% of carbon, 5.19% of hydrogen, 16.48% of oxygen, and 28.85% of nitrogen. The molecular weight is 194.19 g/mol. Find out the molecular and empirical formula.
C4H5N2O.
The quantity of heat required to change the temperature of 1g of water by 1 degree C.
a calorie