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Atoms and The Periodic Table Vocab

Across
number of protons in the nucleus of an atom, which determines the chemical properties of an element and its place in the periodic table
ne of two or more species of atoms of a chemical element with the same atomic number and position in the periodic table and nearly identical chemical behavior but with different atomic masses and physical properties.
a positively charged elementary particle that is a fundamental constituent of all atomic nuclei
​the region of negative charge surrounding an atomic nucleus
diagrams that show the bonding between atoms of a molecule, as well as the lone pairs of electrons that may exist in the molecule
chemical elements with similar properties; under standard conditions, they are all odorless, colorless, monatomic gases with very low chemical reactivity
the particle in the atomic nucleus with a mass of one and a charge of zero
stable negatively charged component of an atom; outside the nucleus
Down
Russian chemist and inventor. He is best known for formulating the Periodic Law and creating a farsighted version of the periodic table of elements.
smallest unit into which matter can be divided without the release of electrically charged particles
table of the chemical elements arranged in order of atomic number, usually in rows, so that elements with similar atomic structure
any of a class of substances characterized by high electrical and thermal conductivity as well as by malleability, ductility, and high reflectivity of light
an element (e.g. arsenic, antimony, or tin) whose properties are intermediate between those of metals and solid nonmetals or semiconductors.
mass of an atom
any substance that cannot be decomposed into simpler substances by ordinary chemical processes
bad conductors of heat and electricity
the small, dense region consisting of protons and neutrons at the center of an atom