substance
what are more than 100 substances that that cannot be chemically inter converted or broken down into simpler substances ?
what is element
what is a stable subatomic particle occurring in all atomic nuclei, with a positive electric charge equal in magnitude to that of an electron ?
what is protons
what is 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 ?
what is atomic number
what is any of the set of metallic elements occupying a central block ?
what is transition metals
what place in the US grows coffee ?
what is hawaii
what is an atom or molecule with a net electric charge due to the loss or gain of one or more electrons ?
what is an ion
what is a subatomic particle of about the same mass as a proton but without an electric charge ?
what is a neutron
what is the mass of an atom of a chemical element ?
what is atomic mass
what are elements that have very similar properties: they are all shiny, silvery-white, somewhat reactive metals at standard temperature and pressure ?
what is alkaline earth metals
what condiment in every restaurant now used to be used as medicine ?
what is ketchup
what is the measure of the size of its atoms, usually the mean or typical distance from the center of the nucleus to the boundary of the surrounding shells of electrons ?
what is atomic radius
what is the outer shell electron that is associated with an atom, and that can participate in the formation of a chemical bond if the outer shell is not closed ?
what is valence electrons
what is a solid material that is typically hard, shiny, malleable, fusible, and ductile, with good electrical and thermal conductivity ?
what is metal
what are reactive nonmetallic elements that form strongly acidic compounds with hydrogen from which simple salts can be made ?
what is halogens
what is triskaidekaphobia ?
what is a fear of the number 13
what is the minimum amount of energy required to remove the most loosely bound electron ?
what is first ionization energy
what is a stable subatomic particle with a charge of negative electricity, found in all atoms and acting as the primary carrier of electricity in solids ?
what is electrons
what is an element or substance that is not a metal ?
what is nonmetal
any of the gaseous elements helium, neon, argon, krypton, xenon, and radon are known as ?
what is noble gases
what is 1891
what is the tendency of an atom to attract a shared pair of electrons towards itself ?
what is electronegativity
what is the net positive charge experienced by an electron in a polyelectronic atom ?
what is nuclear charge
what is an element whose properties are intermediate between those of metals and solid nonmetals or semiconductors ?
what is metalloid
what are very reactive, electropositive, monovalent metals forming strongly alkaline hydroxides ?
what is alkali metal
who was the 37th president of the united states ? (no searching)
what is Richard Nixon