Unit 2: The Periodic Table Vocabulary Flashcards
(45 cards)
Actinoid Definition
Elements in the bottommost of two rows that are set below the main table
Alkali Metal Definition
The metals found in the first column on the left of the periodic table
Alkaline Earth Metal Definition
The elements in the second column of the periodic table
Brittle Definition
Shatters easily
Conductivity Definition
The ability to easily transmit heat energy or electricity
Ductility Definition
The ability to be drawn into a wire
Halogen Definition
The elements in the second column from the right
Lanthanoid Definition
Elements in the uppermost of two rows that are set below the main table
Luster Definition
Shine
Malleability Definition
The ability to be hammered into thin sheets
Metal Definition
An element that is lustrous, conducts electricity and thermal energy, is malleable, is ductile, and often reacts with an acid
Metalloid Definition
An element that is solid at room temperature and weakly conducts electricity and thermal energy
Noble Gas Definition
Elements found in the right-most column of the periodic table
Nonmetal Definition
An element that isn’t lustrous, poorly conducts electricity and thermal energy, and is brittle
Period Table of Elements Definition
A table that lists all the known chemical elements arranged by increasing atomic number as you go from left to right and from top to bottom
Reactivity Definition
The ability to chemically react
Transition Metal Definition
Elements located in the middle of the periodic table (columns 3-12)
Atomic Mass Definition
The mass of an atom
Atomic Number Definition
The number of protons in the nucleus of an atom
Energy Level Definition
Area surrounding the nucleus occupied by electrons, also known as orbitals or shells; the location where an electron is most likely to be located in an atom, based on the energy of the electron
Group Definition
A column in the periodic table
Isotope Definition
An atom with the same number of protons but different number of neutrons than indicated on the periodic table
Nucleus Definition
Small, dense region at the center of an atom composed of protons and neutrons; the dense, positively charged center of an atom that contains most of the mass of the atom
Period Definition
A row in the periodic table
