Hesi A2 Entrance Exam : Chemistry 2018
Scientific Notion - ANSScientific system of writing numbers
Method to write very big/very small numbers easily
Composed of 3 parts (+ / -)
Mathematical sign
Significand
Logarithm
Metric System of Measurement - ANSWeight, Length, and Volume
Basic Measure of weight - ANSa gram (g)
Basic Measure of Volume - ANSa liter (L)
Basic Measure of Distance - ANSa meter (m)
Freezing water - ANS0^C or 32^F
Normal Body temperature - ANS37^C or 98.6^F
Boiling Water - ANS100^C or 212^F
Atom - ANSBasic building block of all molecules
Most of the volume of an atom is empty space
Simplest form of matter that can naturally exist in nature
Atoms physical structure - ANSNucleus and orbits (electron clouds)
Nucleus - ANSCenter of an Atom
Composed of protons and neutrons
What is the Outermost part of the atom? - ANSThe orbits of the electrons which spin around
the nucleus forming electron clouds
Electrons orbit the nucleus at various energy levels called? - ANSShells or Orbits
Like layers in an onion
, Each orbital is filled to capacity, atoms begin
An atom is most stable when? - ANSIt's outermost orbit is full
Protons - ANSHave a positive electrical charge
Electrons - ANSHave a negative charge
Neutrons - ANSHave no charge at all
Ground State Atoms - ANSTend to have equal numbers of protons and electrons making
them electrically neutral
Ion or Ionic State - ANSAn atom that is electrically charged
Ionic state occurs when - ANSit is in solution or in the form of a chemical compound
Net positive Charge - ANSLosing Electrons in an ionic state
Net Negative Charge - ANSGaining Electrons in an ionic state
Cation - ANSHas a positive charge
Anion - ANSHas a negative charge
Matter - ANSdefined by its properties
properties of its composite elements
Periodic Table - ANSmade up of a series of rows and colums
Periods - ANSthe row section
Groups - ANSColumns
Group IA - ANSHas a plus 1 charge (+1)
Group IIA - ANSHas a positive 2 charge (+2)
Group IIIA - ANSHas a positive 3 charge (+3)
Group IVA - ANSeither a +4 or -4 charge (+4/-4)
Group VA - ANSNegative 3 charge (-3)
Group VIA - ANSNegative 2 charge (-2)
Group VIIA - ANSNegative 1 charge (-1)
Scientific Notion - ANSScientific system of writing numbers
Method to write very big/very small numbers easily
Composed of 3 parts (+ / -)
Mathematical sign
Significand
Logarithm
Metric System of Measurement - ANSWeight, Length, and Volume
Basic Measure of weight - ANSa gram (g)
Basic Measure of Volume - ANSa liter (L)
Basic Measure of Distance - ANSa meter (m)
Freezing water - ANS0^C or 32^F
Normal Body temperature - ANS37^C or 98.6^F
Boiling Water - ANS100^C or 212^F
Atom - ANSBasic building block of all molecules
Most of the volume of an atom is empty space
Simplest form of matter that can naturally exist in nature
Atoms physical structure - ANSNucleus and orbits (electron clouds)
Nucleus - ANSCenter of an Atom
Composed of protons and neutrons
What is the Outermost part of the atom? - ANSThe orbits of the electrons which spin around
the nucleus forming electron clouds
Electrons orbit the nucleus at various energy levels called? - ANSShells or Orbits
Like layers in an onion
, Each orbital is filled to capacity, atoms begin
An atom is most stable when? - ANSIt's outermost orbit is full
Protons - ANSHave a positive electrical charge
Electrons - ANSHave a negative charge
Neutrons - ANSHave no charge at all
Ground State Atoms - ANSTend to have equal numbers of protons and electrons making
them electrically neutral
Ion or Ionic State - ANSAn atom that is electrically charged
Ionic state occurs when - ANSit is in solution or in the form of a chemical compound
Net positive Charge - ANSLosing Electrons in an ionic state
Net Negative Charge - ANSGaining Electrons in an ionic state
Cation - ANSHas a positive charge
Anion - ANSHas a negative charge
Matter - ANSdefined by its properties
properties of its composite elements
Periodic Table - ANSmade up of a series of rows and colums
Periods - ANSthe row section
Groups - ANSColumns
Group IA - ANSHas a plus 1 charge (+1)
Group IIA - ANSHas a positive 2 charge (+2)
Group IIIA - ANSHas a positive 3 charge (+3)
Group IVA - ANSeither a +4 or -4 charge (+4/-4)
Group VA - ANSNegative 3 charge (-3)
Group VIA - ANSNegative 2 charge (-2)
Group VIIA - ANSNegative 1 charge (-1)
