What is the density of a 25.8 g piece of broken glass that has a volume of 10.3 cm cubed

Complete the table for ion charge based upon their losing or gaining electrons in the outer shell. (use the periodic table as necessary.) group most likely ionic charge # of valence electrons i +1 ii +2 iii +3 iv +4 or -4 v -3 vi -2 vii -1 viii 0

What type of matter is made of only one kind of atom

What was bohr’s contribution to the planetary model