. A certain diatomic element is a colorless gas and is highly reactive. It has three isotopes with mass #’s 16, 17 and 18 i. What is the naturally occurring diatomic element ? (2 points) ii. Write the isotopic symbols. (2 points) iii. How many neutrons does each possess? (2 points) iv. What is the electronic configuration of each isotope?

i.

ii.

iii. 8, 7 and 9 neutrons respectively

iv. All have same electronic configurations

a boiling water reactor does not boil the water. a pressurized water reactor boils the water faster. a pressurized water reactor is heated directly by the core. a pressurized water reactor does not use fission.

the density(ratio between mass and volume as m/v) decreases from top to bottom in periodic table group as the size increases and nuclear charge decreases. but in periods density increases from left to right as atom size decreases and nuclear charge increases.