a portion of the first two columns of the periodic table is shown. column one from top to bottom reads 11 sodium, 19 potassium, and 37 rubidium. column two reads 12 magnesium, 20 calcium, and 38 strontium.
which of the following elements is more reactive than the others? calcium (ca) magnesium (mg) potassium (k) sodium (na)
An atom of sodium-23 (atomic number = 11) has a positive charge of +1. give this information, how many electrons does it have? how many proteins and neutrons does this atom have
In the millikan oil drop experiment they determined that every drop had a charge which was a while number multiple of -1.60x10^-19. if a drop has a total charge of -9.60x10^-19 then how many excess electrons are contained within the drop?