What is the energy of a photon with frequency 4.40*10^14 S^-1? a) 2.92*10^-19 J
b) 6.61*10^-19 J
c) 7.85*10^-19 J
d) 3.05*10^-19 J
e) none of the above

by cartels in other countries, shipped by air, mail, or land. i cant really see your answer choices : /

pie chart because it is in percents ( % )

i do not get it   at all

nacl or sodium chloride is an ionic compound. this is because an ionic compound pertains to a compound that consists of positively and negatively charged ions. in this case, na (sodium) has a tendency to lose one electron when it reacts with with other atoms, so the resulting sodium ion contains 11 protons and 10 electrons, thus making it positively charged (na+), when chlorine reacts, it usually gains one electron to form an ion called chloride, thus making it negatively charged ( since the ions are oppositely charged, they attract.