HELP! Type the correct answer in each box. Platinum (Pt) is in the 78th position in the periodic table.
A neutral atom of the element that comes just before platinum in the periodic table has electrons and protons.

the ratio of the conjugate base to the acid required to attain the desired ph.

the density of gold = 19.3 g/cm3

the relation between density and mass and volume is

density = mass / volume

given :

mass of gold = 13 g

density = 13g / volume = 19.3

volume = 13 /19.3 = 0.67 cm^3

thus volume of gold nugget = 0.67 cm^3

it forms an anion that has a larger radius. anions have a negative charge and are larger than the original atom.