The big bang theory states that

a. the universe will explode

b. the universe began as a small, dense ball of matter

c. the universe is contracting

d. the universe cannot expand anymore

Sugar is dissolved in water. which is the solute? sugar neither both water

In the following table, all the columns for the element calcium are filled out correctly. element electron structure of atom electron structure of ion net ionic charge calcium 1s22s22p63s23p64s2 1s32s22p63s23p64s1 +1 true false

What does the symbol (–hfus) indicate in a phase change?