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Chap. 1 Unit D Word Scramble

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500 Words

Question	Answer
proton	a positively charged paritcle located in an atom's nucleus
neutron	a particle that has no electric charge and is located in an atom's nucleus
nucleus	the central region of an atom where most of the atom's mass is found in protons and neutrons
electrons	a negatively charged particle located outside an atom's nucleus
atomic number	the number of protons in the nucleus of an atom
atomic mass number	the total number of protons and neutrons in an atom's nucleus
isotope	an atom of one element that has a different number of neutrons than another atom of the same element
ion	an atom or group of atoms that has a positive or negative electric charge
atomic mass	the average mass of the atoms of an element
periodic table	a table of the elements, arranged by atomic number, that shows patterns in their properties
group	a vertical column in the periodic table of the elements. they have similar properties
period	a horizontal row in the periodic table of the elements. they have varying properties
reactive	likely to undergo a chemical change
metals	an element that tends to be shiny, easily shaped, and a good conductor of electricity and heat
nonmetals	an element that is not a metal and has properties generally opposite to those of a metal
metalloids	an element that has properties of both metals and nonmetals
radioactivity	the process by which the nucleus of an atom of an element releases energy and particles
half-life	the length of time it takes for half of the atoms in a sample of a radioactive element to decay into atoms of another element