Ifound these coins near the opening of a foul-smelling cave. i believe they were shiny metal at one point, perhaps silver, platiinum, or aluminum. ive determined the mass of each coin to be 315 g and the volume to be 30 cm3. what element are the coin mande of

c- cold periods in earth's history during which glaciers covered much of the surface.

explanation:

b) nuclear ive learned that in a pedtrodic table

the answer is c.the valence of the atoms combine .

answer is: nuclear fusion produces elements that are heavier than helium.

nuclei combine to form a heavier nucleus, releasing energy.  

for example, fusion of hydrogen atoms at the sun.  

this fusion nuclear reaction is in the inner core of the sun and hydrogen (atomic number 1) is conveted into helium (atomic number 2).  

the inner core is the central region of the sun and all solar energy is produced in the core by nuclear fusion.