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Chapter 17 Voab
Question | Answer |
---|---|
the smallest particle of an element that still retains the properties of the element | atom |
positively charged center of an atom that contains protons and neutrons and is surrounded by a cloud of electrons. | nucleus |
particle,composed of quarks,inside the nucleus of an atom that has a charge of 1 plus | proton |
neutral particle,composed of quarks,inside the nucleus of an atom. | neutron |
particles surrounding the center of an atom that have a charged 1 negative. | electron |
particles of matter that make up protons and neutrons. | quark |
area around the nucleus of an atom where the atoms's electrons are most likely to be found. | electron cloud |
number of protons in an atom's nucleus. | atomic number |
sum of the number of protons and neutrons in an atom's nucleus. | mass number |
atoms of the same element that have different numbers of neutrons. | isotope |
weighted-average mass of the mixture of an element's isotopes. | average atomic mass |
organized list of all known elements that are arranged by increasing atomic number and by changes in chemical and physical properties. | periodic table |
vertical column in the periodic table. | group |
uses the symbol for an element and dots representing the number of electrons in the element's outer energy level. | electron do diagram |
horizontal row in the periodic table. | period |