Chapter 20 science
What is the oxidation number of sodium in the compound Na3PO4?
3+
when an atom is chemically stable, how many electrons are in it's outer energy level?
8
a compound composed of two elements
Binary compound
Which of these is an example of an anhydrous compound? H2O, CaSO4, CUSO4*5H2O, CaSO4*2H2O
CaSO4
tells which elements are in a compound and their ratios
Chemical formula
a bond formed from shared electrons
Covalent bond
crystalline substance that contains water
Hydrate
a positively or negatively charged particle
Ion
a chemical bond between oppositely charged ions
Ionic bond
a particle made of covalently bonded atoms
Molecule
which of the following formulas represents a nonpolar molecule? N2, H2O, NaCl, HCl
N2
Which is a binary ionic compounds? O2, NaF, H2SO4, Cu(NO3)2
NaF
show's an element's combining ability
Oxidation number
What is the chemical formula for lead (II) oxide?
PbO
a molecule with partially charged areas
Polar molecule
a charged group of atoms
Polyatomic ion
what is the name of CuO?
copper (II) oxide
Which of the following is an atom that has gained an electron?
negative ion
What do the group 7A elements become when they react with group 1A elements?
negative ions
which elements are least likely to react with other elements?
noble gases
one in which electrons are shared equally in bonds
nonpolar molecule
Which of these is an example of a covalent compound? sodium chloride, calcium chloride, calcium fluoride, sulfur dioxide
sulfur dioxide
