1a
what is the atomic number if radon
86
what determines the atomic number of an element?
the number of protons
how do ionic compounds conduct electricity
when dissolved in water
define what an ion is
an atom with a electrical charge
what are the 3 main particals that make up an atom
protons, neutrons, and electrons
what are valence electrons
the outermost electrons that actually interact and start the bonding with other elements
which type of compound typically has a higher melting and boiling point
metals and gass
explain how an atom becomes a cation or a anion
when a atom gains a positive or a negative charge
how does electronegativity change as you go down a group on the periodic table
it decreases
explain how the number of protons determines the elements position on the periodic table
the protons are equal to the atomic number
compare solubility of ionic and covalent compounds in water
the stronger the bond the harder it is to dissolve
what happens to the charge of an atom when it gains electrons
the charge goes down by one per electron
perdict the reactivity of an element with 7 valence electrons
highly nonreactive
describe the difference in rectivity between metals and nonmetals based on the valence electrons
a element with lower valence electrons wants more and a full element has some to spare so when there is energy and the elements are close they bond and the lesser one gains a electron and the one that had more now has 7
describe how ionic compounds are formed
when two elements make an ionic bond
what are isotopes
atoms with equally protons but unequal neutrons
compare the atomic size and reactivity of sodium (Na) and chlorine(Cl), what trends can you identify
it turns into salt as the bond
analyze why noble gasses are mostly inert compared to other elements
the are the most stable and do not let the electons budge
evaluate how the differences in bonding affect the physical state of ionic and covalent compounds at room temperature
some are liquid and others are solid or gas
why is it important to include the charge when writing the symbol for an ion
to let people know if the charge is positive or negative and by how muvh