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Chap 17Vocab
Chap 17 Vocab
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 |
Particles, composed of quarks, inside the nucleus of an atom that has a charge of 1+. | Proton |
Neutral particle, composed of quarks, inside the nucleus of an atom. | Neutron |
Particles surrounding the center of an atom that have a charge of 1-. | Electron |
Particles of matter that make up protons and neutrons. | Quark |
Area around the nucleus of an atom where the atom'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 dot diagram |
Horizontal row in the periodic table.The amount of time it takes one wavelength to pass a fixed point; is expressed in seconds. | Period |