chemistry Crossword

states that mass is neither created nor destroyed during ordinary reactions or physical changes
if two or more different compounds are composed of the same two elements with a certain mass of the first element is always a ratio of small whole numbers
the fact that a chemical compound contains the same elements in exactly the same proportions by mass regardless of the size of the sample or source of the compound
the smallest particle of an element that retains the chemical properties of that element
is a very small region located at the center of an atom
postively charged particles in the nucleus; mass of 1 amu
neutral particles in the nucleus of an atom; mass of 1 amu
negatively charged particles present in a cloud around the nucleus; have a mass of almost zero
protons, neutrons and electrons
experiments done in this tube with electrons and a magnet
Thomson's model for the atom; electrons are present scattered throughout a positive field
positively charged particles with about four times the mass of a hydrogen atom
these short range proton-neutron, proton-proton, and neutron-neutron forces hold the nuclear particles together
the number of protons of each atom of that element
atoms of the same element that have different masses; vary in number of neutrons
the most common type of hydrogen; an isotope with one nucleon
isotope of hydrogen with a total of 2 nucleons
isotope of hydrogen with a total of 3 nucleons
is the total number of protons and neutrons that make up the nucleus of an isotope
the mass number is written with a hyphen after the name of the element
shows the composition of a nucleus (mass and atomic number)
is a general term for a specific isotope of an element
1 amu, or is exactly 1/12 the mass of a carbon-12 atom
is the weighted average of the atomic masses of the naturally occuring isotope of an element
6.0221415 x 10^23 is the number of particles in exactly one mole of a pure substance
is the amount of a substance that contains as many particles as there are atoms in exactly 12g of carbon-12
the mass of one mole of a pure substance
isotopes made in a lab
a proton or neutron; particle found in the nucleus