What type of bonding is found in the compound of2? a. covalent bonding b. hydrogen bonding c. ionic bonding d. metallic bonding?

Calculate the number of kilojoules to warm 125 g of iron from 23.5°c to 78.0°c.

Ineed ! i have no clue how to do this problem.

As we move from left to right across the periodic table, what is the general trend? a) atomic radii increase. b) electronegavitiy decreases. c) nuclear shielding increases. d) metallic character decreases.