chem exam one

• the nucleus of an atom contains protons and neutrons
• vertical columns of the periodic table are periods
• how many grams are equivalent ro 27.7mg?

  0.0277 grams
• barium forms an ion with a charge of +2.
• the empirical formula of the ionic compound that forms from calcium and bromine is CaBr2
• when aqueous solutions of AgNO3 and KI are mixed AgI precipitates into the balanced net ionic equation of Ag+ + K+ ---> AgI
• oxidation state of magnesium metal is +2
• chlorine forms an in with a charge of -1
• empirical formula of aluminum and oxygen is Al2O3
• the atomic number indicates the number of protons in an atom of an element.
• ammonium sulfide formula is NH4SO3
• formula mass for sulfuric acid is H2SO4
• horizontal rows of the periodic table are called periods
• combonation of protons, neutrons and electrons for isotope of copper is copper-63p 29n 63e
• an exothermic reaction is a reaction that releases energy to the surroundings
• acid is anything that increases the H+ ion concentration
• barium forms and ion with a charge of +2.
• empirical formula for calcium and bromine: CaBr2
• group that only contains nonmetals: 8A
• oxidation state of magnesium metal is +2
• decimal power that the abbreviation micro represents is 10^-6
• the atomic number indicates the number of protons in an atom of an element.
• the correct formula for ammonium sulfide is NH4SO3
• H+ concentration increases is an acid as said by Arrhenius
• the number 2.00560 has a significant figure of 3
• formula mass for sulfuric acid H2SO4 is 48.1