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Ch 14 Physical Science
Ms. Stringer's Class
Terms in this set (29)
anything that has mass and takes up space
matter made of one atom of one kind
electrode with a negative charge
a negatively particle found OUTSIDE THE NUCLEUS
electrode with a positive charge
positively charged particle present IN THE NUCLEUS of all atoms
consists of a particle containing two protons and two neutrons
region surrounding the nucleus where electrons travel
neutral particle found IN THE NUCLEUS of an atom that has the same mass as a proton
the basic unit of an element that retains all the properties of that element
number of PROTONS in nucleus of an atom of a given element
release of nuclear particles and energy from an unstable atomic nuclei
SUM of neutrons AND protons
atoms of the same element that have different numbers of neutrons
the time needed for one-half of the mass of a sample of a radioactive isotope to decay
high energy electron that comes from the nucleus
change of one element into another through radioactive decay
If I know the atomic number of an element, I know the number of _______________ in the nucleus of an atom of that element.
Atoms of the same element that have different numbers of _______________ are called isotopes.
The _____________ ______________ is the number of neutrons PLUS protons
A neutral atom of Carbon-13 has 6 protons, ______ electrons, and ______ neutrons
6 electrons and 7 neutrons
If the atomic number of boron is 5, boron-11 contains _______ protons and ________ neutrons.
5 protons and 6 neutrons
________ developed a model of an atom that was a solid sphere with the same composition throughout.
___________ experimented with a cathode ray.
Scientist who discovered electrons
________ discovered protons using a gold foil experiment.
An atom contains __________ and _____________ in its nucleus.
protons AND neutrons
An isotope is an atom of the same element with a different number of ___________.
Which particles surround the nucleus of the atom?
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