2.6 compounds and formulae Flashcards
what is a compound
when more than 1 different types of atoms join together
what is the chemical term for atoms joining together?
bonding
what if a compound has a metal?
the metal comes first in the compound name
what if a compound has a non-metal
the name of the non-metal is usually changed
which 2 elements are combined in sodium chloride
sodium, chlorine
which 2 elements were combined in hydrogen sulfide
hydrogen, sulfur
which 2 elements are combined in magnesium oxide?
magnesium, oxygen
why is the compound with calcium, oxygen, and carbon called ‘calcium carbonate’
some compounds contain 2 different elements, plus a third element—oxygen. these compounds often have names ending with ‘ate’
suggest which 3 elements are in calcium nitrate
calcium, nitrogen, oxygen
suggest the formula for carbon dioxide, and why the formula is like that
CO2
carbon dioxide consists of 1 carbon atom, and 2 oxygen atoms, so after oxygen, a ‘2’ means that there are 2 oxygen atoms
is the symbol ‘NaCl’ a compound or an element? explain
compound, because there is ‘Cl’ meaning chlorine, and ‘Na’ meaning sodium
the formula for calcium chloride is CaCl2, so how do you know how many chlorine atoms are combined with calcium atoms?
calcium: 1 atom
chlorine: 2 atoms
the compound with the formula ‘CO’ is carbon monoxide, so suggest why it is not simply called ‘carbon oxide’
‘mono’ means 1, so if there is 1 atom of oxygen, it is called carbon monoxide
suggest the names of the compound with this formula: MgO
magnesium oxide
