HESI A2 Chemistry, A2 Hesi Chemistry
HESI A2 Chemistry, A2 Hesi Chemistry Exam
Study online at https://quizlet.com/_990lr3
1. Metric system Gram (g)- Weight
Liter (L)- Volume
Meters (m)- distance
2. Metric prefixes
3. Fahrenheit Is a temperature measuring system used only in the U.S., its territories, Belize, and
Jamaica
Barley used for any scientific measurement except for body temperature
Characteristics:
-zero degrees is the freezing point of sea water or heave brine at sea level
32 degrees F is the freezing point of pure water at sea level
212 degrees F is the boiling point of pure water at sea level
4. Celsius Sometimes called centigrade is a temperature system used in the rest of the world
and by scientific community.
Characteristics:
Zero degrees is the freezing point of pure water at sea level
100 degrees C is the boiling point of pure water at sea level
Most people have a body temperature of 37 degrees C
5. Kelvins
, HESI A2 Chemistry, A2 Hesi Chemistry
HESI A2 Chemistry, A2 Hesi Chemistry Exam
Study online at https://quizlet.com/_990lr3
(temperature)
Is used only in the scientific community
Does NOT use Negative Numbers
Characteristics:
0 Kelvin is -273 degree C and is thought to be the lowest temperature achievable
or absolute zero
The freezing point of water is 273 K
The boiling point of water is 373K
Most people have a body temperature of 310 K but this is never used
6. Important tem- Melting ice: 21 C and 32 F
peratures
Normal body temp: 37 C and 98.6 F
Boiling water: 100 C and 212 F
7. Atom Nucleus and electron clouds (orbits)
8. Nucleus Consists of protons and neutrons at the the center of the atom.
9. Orbits (electron _________ of the electron are the outermost parts. Which spin around the
cloud) nucleus at fantastic speeds.
10. Ground state Tend to have equal numbers of protons and electrons, making them electrically
atoms neutral
11. Ionic state (ion) When an atom is electrically charged.
Usually occurs when it is in a solution or in the form of a chemical compound.
Will have lost electrons, result in a net positive charge or will have gained elec-
trons, resealing in a net negative charge.
, HESI A2 Chemistry, A2 Hesi Chemistry
HESI A2 Chemistry, A2 Hesi Chemistry Exam
Study online at https://quizlet.com/_990lr3
12. Cation Positive charge atom
13. Anion Negative charge atom
14. Periodic table Is made up of a series of rows called periods and columns called groups.
A table of known elements arranged according to their properties
15. Atomic number # of protons in the nucleus and it defines an atom of a particular element
16. Atomic mass Is the average mass of each of the elements isotopes.
# at the bottom of each square in the periodic table; and its usually a decimal #.
17. `Isotopes Different kinds of the same atom that vary in weight
# of protons remain the same
18. Compounds
, HESI A2 Chemistry, A2 Hesi Chemistry
HESI A2 Chemistry, A2 Hesi Chemistry Exam
Study online at https://quizlet.com/_990lr3
Combination with other elements
Combine in whole # ratios
19. Chemical equa- Reactants --> Products
tions
ex. AgNO3 + KCl --> AgCl + KNO3
* Law of Conversation: Mass CANNOT be Created NOR Destroyed
20. Equilibrium A state in which reactants are forming products at the same rate that products are
forming reactants.
*reversible
A + B --> C + D
21. Four ways to in- Increase the temperature
crease the reac-
tion rate Increase the surface area
Add a catalyst
Increase the concentration of reactants
22. Solutions Defined as a homogenous mixtures of two or more substances
23. Solute Part or parts of being dissolved
24. Solvent Part that is doing the dissolving
Can be a liquid in a liquid, a solid in a liquid, or a solid in a solid
25. Types of solu- Compounds
tions Alloys
Amalgams
Emulsions
HESI A2 Chemistry, A2 Hesi Chemistry Exam
Study online at https://quizlet.com/_990lr3
1. Metric system Gram (g)- Weight
Liter (L)- Volume
Meters (m)- distance
2. Metric prefixes
3. Fahrenheit Is a temperature measuring system used only in the U.S., its territories, Belize, and
Jamaica
Barley used for any scientific measurement except for body temperature
Characteristics:
-zero degrees is the freezing point of sea water or heave brine at sea level
32 degrees F is the freezing point of pure water at sea level
212 degrees F is the boiling point of pure water at sea level
4. Celsius Sometimes called centigrade is a temperature system used in the rest of the world
and by scientific community.
Characteristics:
Zero degrees is the freezing point of pure water at sea level
100 degrees C is the boiling point of pure water at sea level
Most people have a body temperature of 37 degrees C
5. Kelvins
, HESI A2 Chemistry, A2 Hesi Chemistry
HESI A2 Chemistry, A2 Hesi Chemistry Exam
Study online at https://quizlet.com/_990lr3
(temperature)
Is used only in the scientific community
Does NOT use Negative Numbers
Characteristics:
0 Kelvin is -273 degree C and is thought to be the lowest temperature achievable
or absolute zero
The freezing point of water is 273 K
The boiling point of water is 373K
Most people have a body temperature of 310 K but this is never used
6. Important tem- Melting ice: 21 C and 32 F
peratures
Normal body temp: 37 C and 98.6 F
Boiling water: 100 C and 212 F
7. Atom Nucleus and electron clouds (orbits)
8. Nucleus Consists of protons and neutrons at the the center of the atom.
9. Orbits (electron _________ of the electron are the outermost parts. Which spin around the
cloud) nucleus at fantastic speeds.
10. Ground state Tend to have equal numbers of protons and electrons, making them electrically
atoms neutral
11. Ionic state (ion) When an atom is electrically charged.
Usually occurs when it is in a solution or in the form of a chemical compound.
Will have lost electrons, result in a net positive charge or will have gained elec-
trons, resealing in a net negative charge.
, HESI A2 Chemistry, A2 Hesi Chemistry
HESI A2 Chemistry, A2 Hesi Chemistry Exam
Study online at https://quizlet.com/_990lr3
12. Cation Positive charge atom
13. Anion Negative charge atom
14. Periodic table Is made up of a series of rows called periods and columns called groups.
A table of known elements arranged according to their properties
15. Atomic number # of protons in the nucleus and it defines an atom of a particular element
16. Atomic mass Is the average mass of each of the elements isotopes.
# at the bottom of each square in the periodic table; and its usually a decimal #.
17. `Isotopes Different kinds of the same atom that vary in weight
# of protons remain the same
18. Compounds
, HESI A2 Chemistry, A2 Hesi Chemistry
HESI A2 Chemistry, A2 Hesi Chemistry Exam
Study online at https://quizlet.com/_990lr3
Combination with other elements
Combine in whole # ratios
19. Chemical equa- Reactants --> Products
tions
ex. AgNO3 + KCl --> AgCl + KNO3
* Law of Conversation: Mass CANNOT be Created NOR Destroyed
20. Equilibrium A state in which reactants are forming products at the same rate that products are
forming reactants.
*reversible
A + B --> C + D
21. Four ways to in- Increase the temperature
crease the reac-
tion rate Increase the surface area
Add a catalyst
Increase the concentration of reactants
22. Solutions Defined as a homogenous mixtures of two or more substances
23. Solute Part or parts of being dissolved
24. Solvent Part that is doing the dissolving
Can be a liquid in a liquid, a solid in a liquid, or a solid in a solid
25. Types of solu- Compounds
tions Alloys
Amalgams
Emulsions
