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exam study guide

study of the composition and structure of materials and the changes that materials undergo best describes the science of.. chemistry
applied research is.. carried out to solve a problem
the branch of chemistry concerned with the properties, changes, and relationships between energy and matter is.. physical chemistry
a physical property may be investigated by.. melting ice
basic research is.. carried out for the sake of increasing knowledge
two features that distinguish matter are.. mass and volume
which of the following is an intensive physical property? color
which is NOT a property of metals? unreactivity
the most useful source of chemical information about the elements is a.. periodic table
the elements that border the zigzag line in the periodic table are.. metalliods
quantitative observations are recorded using.. numerical information
a testable statement used for making predictions and carrying out further experiments is a.. hypothesis
standards are chosen because they.. are reproducible in another laboratory.
the metric unit for length that is closest to the thickness of a dime is the.. millimeter
a change in the force of Earth's gravity on an object will affect its.. weight
poor precision in the scientific measurement may arise from.. both human error and the limitations of the measuring instrument.
in division and multiplication, the answer must not have more significant figures than the.. number in the calculation with the fewest significant figures.
the number of significant figures in the measurement 210 cm is.. 2
divide 5.7m by 2m. the quotient is correctly reported as.. 3 m
if some measurements agree closely byt differ widely from the actual value, these measurements are.. precise, but not accurate
who was the schoolmaster who studied chemistry and proposed an atomic theory? John Dalton
who discovered the nucleus by bombarding gold foil with positively charged particles? Rutherford
experiments with cathode rays led to the discovery of the.. electron
organic chemistry is the study of.. carbon containing compounds
the smallest unit of an element that can exist alone or in combination with other such particles is an.. atom
nickel-60 has.. 32 neutrons
the total number of protons and neutrons in the nucleus of an atom is its.. mass number
which of the following processes always decreases the number of protons by an even number? alpha decay
gamma rays are.. electromagnetic waves
what are often used to monitor the approximate radiation exposure of people working with radioactive materials? film badges
for electromagnetic radiation, c (speed of light) equals frequency times wavelength
one of the wave properties of electromagnetic radiation, such as light, is.. frequency
a quantum of electromagnetic energy is called a.. photon
Max Planck proposed that a hot object radiated energy in small, specific amounts called.. quanta
the emission of electrons from metals that have absorbed photons is called the.. photoelectric effect
the French scientist Louis de Broglie believed.. electrons could have a dual wave-particle nature.
the part of the atom where an electrons CANNOT be found is the.. nucleus
a three-dimensional region around a nucleus where an electron may be found in called a(n).. orbital
the number of orbitals for the d sublevel is.. 5
the main energy level that can hold only two electrons is the.. first
elements in a group of column in the periodic table can be expected to have similiar.. properties
Mendeleev predicted that the spaces in his periodic table represented.. undiscovered elements
argon, krypton, and xenon are.. noble gases
one-half the distance between the nuclei of identical atoms that are bonded together is called the.. atomic radius
the person whose work led to a periodic table based on increasing atomic number was.. Moseley
the most reactive group of nonmetals are the.. halogens
the energy required to remove an electron from an atom is the atom's.. ionization energy
a positive ion is known as a(n).. cation
a negative ion is known as a(n).. anion
in a row (going across) in the periodic table, as the atomic number increases, the atomic radius.. decreases
a mutual electrical attraction between the nuclei and valence electrons of different atoms that binds the atoms together is called a(n).. chemical bond
atoms are ____ when they are combined. more stable
the chemical bond formed when two atoms share electrons is called a(n).. covalent bond
if two covalently bonded atoms are identical, the bond is.. nonpolar covalent
if the atoms that share electrons have an unequal attraction for the electrons, the bond is called.. polar
a covalent bond results when ____ are shared. electrons
a neutral group of atoms held together by covalent bonds is a.. molecule
an octet is equal to.. 8
which of the following is NOT a property of an ionic compound? low boiling point
the electron-sea model of bonding represents.. metallic bonding
Created by: willieb