How many atoms are in 6.3 moles of calcium

Which of the following pairs of elements belong to the same groupa. h and he b. li and bec. c and pb d. ga and ge

The atom fluorine generally will become stable through the formation of an ionic chemical compound by accepting electron(s) from another atom. this process will fill its outer energy level of electrons.

Draw the lewis structure for the trisulfur s3 molecule. be sure to include all resonance structures that satisfy the octet rule.