Dentify whether each element is a halogen, a noble gas, or nonmetal only. Astatine (At):

Nitrogen (N):

Krypton (Kr):

Chlorine (Cl):

Sulfur (S):

What’s the scientific notation for the number 6,840,000,000

What is the mass defect of a mole of nuclei with 1.8 x 10^15 j/mol binding energy?

Asample of air with a volume of 2.20m3 at a pressure of 105 kpa and a temperature of 30c is cooled to 10c and the pressure is reduced to 75.0 kpa. what is the new volume? 6.9 1.34 2.56 43.0 2.88