Alkali Metals
Vocabulary: Any of the highly reactive elements lithium, sodium, potassium, rubidium, cesium,
and francium, occupying Group IA (1) of the periodic table
Sentence: Alkali Metals are highly reactive elements of lithium, sodium, potassium, rubidium,
cesium, and francium.
Alkaline Earth Metals
Vocabulary: The alkaline earth metals are a series of elements comprising Group 2 (IUPAC
style) (Group IIA) of the periodic table: beryllium (Be),...
Sentence: Alkaline Earth Metals are in Group 2 of the periodic table.
Halogen:
Vocabulary: Any of the elements fluorine, chlorine, bromine, iodine, and astatine, occupying
group VIIA (17) of the periodic table.
Sentence: Halogens is any elements of fluorine, chlorine, bromine, iodine, and astatine.
Inner Transition Elements
Vocabulary: Elements in the periodic table that have three shells that are not filled with
electrons. The shells are usually the outer three shells.
Sentence: Inner Transition Elements have three shells.
Lanthanide Series:
Vocabulary: the rare-earth elements with atomic numbers 57 through 71; having properties
similar to lanthanum.
Sentence: Lanthanide Series atomic numbers are 57 through 71.
Actinide Series:
Vocabulary: a series of 15 radioactive elements with increasing atomic
numbers from actinium to lawrencium.
Sentence: Actinide Series has 15 radioactive elements.
Noble Gas:
Vocabulary: Any of the gaseous elements helium, neon, argon, krypton, xenon, and
radon, occupying Group 0 (18) of the periodic table.
Sentence: Noble Gas is helium, neon, argon, krypton, xenon and radon.
Transition Elements:
Vocabulary: The transition elements are those elements having a partially filled or subshell in any
common oxidation state. The term "transition elements" most commonly refers to the d-block transition
elements
Sentence: Transition elements are elements that have partially filled or subshell in any common
oxidation state.
Representation Elements
Vocabulary: The Groups or Families can be further categorized into the Representative Elements
and the Transition Metals.
Sentence: Representation elements is how they are categorized.
Chemical Family:
Vocabulary: a chemical family is elements that are in the same category
Sentence: Chemical family are elements that are in the same category.
Atomic Number:
Vocabulary: The number of protons in the nucleus of an atom, which determines the chemical
properties of an element and its place in the periodic table
Sentence: Atomic number is the number of protons in the atom.
Periodic Table:
Vocabulary: A table of the chemical elements arranged in order of atomic number, usually in
rows, so that elements with similar atomic structure
Sentence: Periodic table is a table with chemical elements.
Protons:
Vocabulary: A stable subatomic particle occurring in all atomic nuclei, with a positive electric
charge equal in magnitude to that of an electron.
Sentence: Proton occurs in all atomic nuclei.
Neutrons:
Vocabulary: A subatomic particle of about the same mass as a proton but without an electric
charge, present in all atomic nuclei.
Sentence: Neutron has the same mass as a proton.
Electrons:
Vocabulary: A stable subatomic particle with a charge of negative electricity, found in all atoms
and acting as the primary carrier of electricity...
Sentence: Electron has a charge of negative electricity.
Subatomic Particle:
Vocabulary: In physics or chemistry, subatomic particles are the particles smaller than an atom. There
are two types of subatomic particles: elementary particles, which are not made of other particles, and
composite particles.Particle physics and nuclear physics study these particles and how they interact.
Sentence: Subatomic Particle are particles smaller than an atom.
Nucleus:
Vocabulary:
The positively charged central core of an atom, containing most of its mass.
Sentence: Nucleus is a positively charged.
Electric Charge:
Vocabulary: charge: the quantity of unbalanced electricity in a body (either positive or
negative) and construed as an excess or deficiency of...
Sentence: Electric Change is unbalance electricity in a body.
Valence Electrons
Vocabulary: an electron in the outer shell of an atom which can combine with other atoms to
form molecules
Sentence: Valence Electrons the outer shell of an atom
Atomic mass
Vocabulary: The mass of an atom expressed in atomic mass units. It is approximately
equivalent to the number of protons and neutrons in the atom.
Sentence: Atomic mass is the mass of an atom.
Groups
Vocabulary: A number of people or things that are located close together or are considered or
classed together
Sentence: group as elements that have some things in common.
Periods
Vocabulary: elements are arranged in a series of rows (or periods) so that those with similar
properties appear in a column. Elements of the same period have the same number of electron shells;
with each group across a period, the elements have one more proton and electron and become less
metallic.
Sentence: Rows on the periodic table are called periods.
Metals
Vocabulary: A solid material that is typically hard, shiny, malleable, fusible, and ductile, with
good electrical and thermal conductivity
Sentence: metals are a solid.
Non-metals
Vocabulary: Non-metals are the elements in groups 14-16 of the periodic table. Non-metals
are not able to conduct electricity or heat very well. As opposed to metals, non-metallic
elements are very brittle, and cannot be rolled into wires or pounded into sheets. The nonmetals exist in two of the three states of matter at room temperature
Sentence: Non-metals are not shiny.
Metalloids
Vocabulary: An element (e.g., germanium or silicon) whose properties are intermediate
between those of metals and solid nonmetals
Sentence: Metalloids are metal and solid nonmetals.
Chemical symbol
Vocabulary: A chemical symbol is a 1- or 2-letter internationally agreed code for a chemical
element, usually derived from the name of the element
Sentence: Chemical Symbol is usually derived from the name of the element.