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CBB chapter 3
Question | Answer |
---|---|
The central core of an atom containing protons and usually neutrons | Nucleus |
A small positively charged particle in the nucleus of an atom | Proton |
A small particle in the nucleus of an atom, with no electrical charge | Neutron |
A tiny negatively charged particle that moves around the nucleus of an atom | Electron |
The number of protons in the nucleus of an atom | Atomic number |
An atom with the same number of protons and a different number of neutrons from other atoms of the same element | Isotope |
The sum of protons and neutrons in a the nucleus of an atom | Mass number |
In science, a diagram, a mental picture, a mathematical statement, or an object that helps explain ideas about the natural world | Model |
The average mass of all the isotopes of an element | Atomic mass |
A chart of the elements showing the repeating pattern of their properties | Periodic table |
A one- or two- letter representation of an element | Chemical symbol |
A horizontal row of elements in a periodic table | Period |
Elements in the same vertical column of the periodic table, also called a family | Group |
A class of elements characterized by physical properties that include shininess, malleability, ductility, and conductivity | Metals |
A term used to describe material that can be pounded into shapes | Malleable |
A term used to describe a material that can be pulled out into a long wire | Ductile |
The ability of an object to transfer heat or electricity to another object | Conductivity |
The ease and speed with which an element combines, or reacts, with other elements and compounds | Reactivity |
The gradual wearing away of a metal element due to a chemical reaction | Corrosion |
An element in group 1 of the periodic table | Alkali metal |
An element in group 2 of the periodic table | Alkaline Earth Metal |
One of the elements in groups 3 through 12 of the periodic table | Transition metals |
A mixture of two or more elements, one of which is a metal | Alloy |
An element that lacks most of the properties of a metal | Nonmetal |
A molecule consisting of two atoms | Diatomic molecule |
An element found in group 17 of the periodic table | Halogen |
An element in group 18 of the periodic table | Noble gas |
An element that has some characteristics of both metals and nonmetals | Metalloid |
A substance that can conduct electricity under some conditions | Semiconductor |