1) mendeleev organized the elements according to mass numberhow is the modern periodic chart organized?2) How was mendeleev able to predict the properties of germanium and other quot;missingquot; elements?3) what does the number above each element indicate?4) how many protons does AI have?5) how many electrons does aluminum have? how do you know?6) what is the average atomic mass of magnesium? (round to the nearest whole number)?7) how many neutrons does aluminum have?8) write the symbol for gold.9) define quot;periodquot;10) whaty is a quot;groupquot;? what is another name for quot;groupquot;?11) what is an isotope?12) why is the mass number usually written as average insteadof a whole number?
1) mendeleev organized the elements according to mass numberhow is the modern periodic chart organized? by increasing atomic number 2) How was mendeleev able to predict the properties of germanium and other missing elements? when he discovered that an element was missing in the period between Ga Ashe knew it should have properties similar to Si Sn in the same group 3) what does the number above each element indicate? the atomic number indicates the number of protons electrons in each atom of that element 4) how many protons does AI have?
