Complete the following table by providing three elements that correspond to the category. You may choose any three elements than are found in any given category,
Category
Element
Element
Element
s-block
Transition metal
Halogen
C-block
Nonmetal
Metal
Alkali Metal
Noble Gas
Semimetal
Representative Element
Alkaline Earth Metal

8) a mixture of he, ne and ar has a pressure of 7.85 atm. if the ne has a mole fraction of 0.47 and 8) ar has a mole fraction of 0.23, what is the pressure of he? a) 4.2 atm b) 3.7 atm c) 5.5 atm d) 2.4 atm e) 1.8 atm

As changes in energy levels of electrons increase, the frequencies of atomic line spectra they emit

The human activities in two locations are described below: location a: rampant use of plastic containers location b: excessive use of pesticides and fertilizers which statement is most likely true? location a will have poor air quality because plastic is biodegradable. location a will experience water scarcity because plastic absorbs moisture. the population of honeybees will increase in location b because production of crops will increase. the population of fish in location b will decrease because the water is contaminated.