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Chemistry Exam


Study of the composition of materials and the changes that materials undergo best describes the science of chemistry
the branch of chemistry that includes the study of materials and processes that occur in living things is biochemistry
the branch of chemistry that is concerned with the indentification and composition of materials is analytical chemistry
the study of chemistry containing carbon is organic chemistry
technology is the application of scientific knowledge to solve problems
applied research carried out to solve a problem
a physical property may be investigated by melting ice
chemical properties include changes that alter the identity of a substance
two features that distinguish matter are mass and volume
the particles in a solid are packed and close together
qualitive observations are recorded using non-numerical information
the si standard units for length and mass are meter and kilogram
the metric unit for length that is closest to the thickness of a dime is the millimeter
the symbol for the metric unit used to measure mass is g (grams)
the unit m to the third measures volume
the symbol that represents the measured unit for volume is mL
the SI unit for time is the second
to calculate the density of an object, divide its mass by its volume
a change in the Earth's gravity will affect its weight
the number of significant figures in the measurement 0.000305 is 3
isotopes of an element contain different numbers of neutrons
the atomic number of oxygen indicates that there are 8 protons
an aluminum isotope consists of 13 protons, 13 electrons, and 14 neutrons. its mass number is 27
what is the atomic number for aluminum 13
nickel-60 has how many neutrons 32
phosphorus-33 has how many neutrons 18
what does the 218 in polonium-218 represent? the mass number
the half life of an isotope is the time required for half the nuclei in a sample to undergo radioactive decay
the total number of protons and neutrons in the nucleus of an atom is its mass number
chlorine-35 has 17 protons, 17 electrons, and 18 neutrons
sulphur-34 contains how many neutrons 18
The distance between two successive peaks on a wave is its wavelength
an element with 8 electrons in its highest main energy level is a(n) noble gas
the emission of electrons from metals that have absorbed photons is called the photoelectric effect
which group is the noble gases 18
the atomic sublevel with the next highest after 4p id 5s
max planck proposed that a hot object radiated energy in small, specific amounts called quanta
a quantum of electromagnetic energy is called a(n) photon
for electromagnetic radiation, c is the speed of light quals frequency times wavelength
the main energy levels of an atom are indicated by principal quantum numbers
the main energy that can hold 2 electrons is the first
what is the value of the spped of light 3.oo x 18 to the 8th
the discovery of te noble gases changed Mendeleev's periodic table by adding a new group
what group do lithium and potassium belong to alkali metals
Mendeleev attempted to organize the chemical elements based on their properties
argon, krypton, and xenon are noble gases
what group do fluorine and chlorine belong to halogens
Created by: rob hood