CHEM 1211K Exam 1
scientific method an iterative process involving the formulation of questions and conjectures arising
from observations, careful design of experiments, and thoughtful analysis of results
elements of the scientific method observation, hypothesis, experiment, theory
peptide a molecule that consists of molecules called amino acids
molecular models simplified versions of the way atoms are connected and reveal their three-
dimensional arrangement
unit for mass kilogram (kg)
unit for length meter (m)
unit for temperature Kelvin (K)
unit for amount of substance mole (mol)
unit for time second (s)
scientific notation system in which a large or small number is written as a number between 1 and 10
times a power of 10
scientific notation add/subtract rule use the least number of decimal places
scientific notation mult/div rule use the least number of sig figs
celsius to Kelvin °C + 273.15
Kelvin to celsius K - 273.15
g/mL (or g/cm^3) typical units for density
, CHEM 1211K Exam 1
potential energy stored energy; e.g. being at the top of a slide
kinetic energy energy of motion
J (Joule) the SI unit for energy
accuracy how close to the true value a given measurement is
precision how well a number of independent measurements agree with one another
nanotechnology the study and production of materials and structures that have at least one
dimension between 1 nm and 10 nm
element a fundamental substance that can't be chemically changed or broken down into
anything simpler
period horizontal row on the periodic table
group vertical columns on the periodic table
physical property do not involve a change in the sample's chemical makeup
chemical property involves a change in the chemical makeup
law of conservation of mass mass is neither created nor destroyed
law of definite proportions chemical compound always contains its component elements in fixed ratio (by
mass) and does not depend on its source and method of preparation
law of multiple proportions when two elements combine with each other to form more than one compound, the
weights of one element that combine with a fixed weight of the other are in a ratio of
small whole numbers
atomic number number of protons in the atom's nucleus
scientific method an iterative process involving the formulation of questions and conjectures arising
from observations, careful design of experiments, and thoughtful analysis of results
elements of the scientific method observation, hypothesis, experiment, theory
peptide a molecule that consists of molecules called amino acids
molecular models simplified versions of the way atoms are connected and reveal their three-
dimensional arrangement
unit for mass kilogram (kg)
unit for length meter (m)
unit for temperature Kelvin (K)
unit for amount of substance mole (mol)
unit for time second (s)
scientific notation system in which a large or small number is written as a number between 1 and 10
times a power of 10
scientific notation add/subtract rule use the least number of decimal places
scientific notation mult/div rule use the least number of sig figs
celsius to Kelvin °C + 273.15
Kelvin to celsius K - 273.15
g/mL (or g/cm^3) typical units for density
, CHEM 1211K Exam 1
potential energy stored energy; e.g. being at the top of a slide
kinetic energy energy of motion
J (Joule) the SI unit for energy
accuracy how close to the true value a given measurement is
precision how well a number of independent measurements agree with one another
nanotechnology the study and production of materials and structures that have at least one
dimension between 1 nm and 10 nm
element a fundamental substance that can't be chemically changed or broken down into
anything simpler
period horizontal row on the periodic table
group vertical columns on the periodic table
physical property do not involve a change in the sample's chemical makeup
chemical property involves a change in the chemical makeup
law of conservation of mass mass is neither created nor destroyed
law of definite proportions chemical compound always contains its component elements in fixed ratio (by
mass) and does not depend on its source and method of preparation
law of multiple proportions when two elements combine with each other to form more than one compound, the
weights of one element that combine with a fixed weight of the other are in a ratio of
small whole numbers
atomic number number of protons in the atom's nucleus
