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Chemistry Study Guide

•Vocabulary
Atom: the smallest particle into which an element can be divided

Atomic Number: is the number of protons in the nucleus

Atomic Mass: is the sum of protonsand electrons in the nucleus

Electron: are the negatively charged particles in an atom

Cation: an ion that has more protons than electron and is positively charged

Nucleus: is the part of anatom that contains all the mass of it and all of the positive charge

Avogadro ’s number: is the number scientist use to convert from number of atoms to masses of atoms and vice versa

KineticEnergy: is the energy possessed by matter due to its motion

Thermodynamics: is the study of the flow of energy

Pressure: is defined as force per unit area

Barometer: a device that is used thepressure exerted y the collision of gas molecules in our atmosphere with the earth

Manometer: a common laboratory device used to measure gas pressure there are two types open end and close endIdeal Gas: a gas which adheres exactly to the gas laws

Diffusion: is the process of mixing molecules of one substance through another by random molecular motionQuestions
What is the absolute 0 temperature?
•0 Kelvin
Which is the state of matter that is not easily compressed but easily changes shape?
• Liquid
In an atom with negative charge the number ofelectrons is greater than the number of protons
How many atoms are in exactly 1 mole atoms?
•6.022 x 1023
1 standard atmosphere Atm is equal to how many torr?
•It is equal to 760 torr
1 mm ofMercury(Hg) is equal to?
•1 torr
Which are the 3 units of pressure?
•1 bar, 1 Pa, 1 ATM, 1 mmHg, 1 torr
When performing calculations of gas laws the temperature must be expressed in what unit?
•KelvinStandard temperature and pressure is defined as?
•0°C(273.15 K) and 1 atm or 760 torr
Combining boyle’s law, charles’ law,and avogadro’s law qives what equation?
•The ideal Gas equation: PV=nRT...
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