valence electrons and chemical properties - As per the periodic table of elements, how do you know if two elements are likely to have similar chemical properties? I was given this question and the answer was the Si and Ge would have similar che ...
question-1 - The elements argon and potassium have atomic weights 39.95 and 39.10 respectively. What problem if any does this pose for a periodic table in which the elements are arranged in order of increasing ato ...
Ionic Compounds - Give the formula for each of the following ionic compounds:
a) calcium hydrogen carbonate
b) potassium permangante
c) magnesium perchlorate
d) potassium hydrogen phosphate
e) sodium sulfite
Elements in atmosphere in pure form - Which group of elements is normally obtained from the atmosphere in pure form?
a) sulfur, phosphorus, oxygen, nitrogen
b) magnesium, sodium, calcium, strontium
c) flourine, chlorine, neon, argon
...