bonus points
the fixed energies an electron can have are called ___
energy levels
th electrostatic forces that hold ions together in ionic compounds are called ___
ionic bonds
when sunlight passes through a prism,the different wavelengths seperate into a ___ of colors
spectrum
an ion with a positve charge is a(n) ___ and one with a negative charge is a(n) ___
cation, anion
atoms that are held together by sharing electrons are joined by a ___
covalent bond
___ is the ability of an atom of an element to attract electrons when the atom is in a compound
electronegativity
group 7a elements are called ___
halogens
name HCl
hydrogen chloride
name H2O2
hydrogen peroxide
a(n) ___ is a compound that contains one or more hydrogen atoms and produces hydrgoen ions when dissolved in water
acid
name CN-
cyanide
nuclear charge ___ across the periodic table and ___ down the periodic table
increases, increases
name N2O4
dinitrogen teroxide
in the ___, electrons are ejected when light shines on a metal
photoelecric effect
ionization energy ___ across the periodic table and ___ down the table
increases, decreases
size ___ across the periodic table, and generaly ___ down the periodic table
decreases, increases
frequency is represented by the greek letter Nu, which is like the english letter ___
v
a molecule that has two poles is called a dipolar molecule, or a ___
dipole
the ___ is one half of the distance between the nuclei of two atoms of the same element when the atoms are joined
atomic radius
the ions produced when atoms of cholrine and other halogens gian electrons are called ___
halide ions
in 1932 james chadwick confirmd the existence of ___
neutrons
in methane, when the angle of hydrogen to carbon is 109.5o, it is a ___ angle
tetrahedral
___ postulated that atoms combine in simple whole-number ratios
dalton
what is the classic name of Pb2+ (also known as lead(II) ion
plumbous
name HC2H3O2
ethanoic acid