Atoms of which of the following elements are smallest?
A) Cl
B) P
C) S
D) None, they are all the same size.
A
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Indicate whether the statement is true or false
A 1,200-W hair dryer is run for approximately 5 minutes every day. If the electric power company charges 12 cents per kWh, calculate the annual electric energy consumption of the hair dryer and the associated cost.
What will be an ideal response?
In the early 20th century, Pierre and Marie Curie discovered that radioactive decay produces
heat. Indicate whether the statement is true or false.
Ancient igneous intrusive, lunar samples, and some meteorites are dated by uranium-lead and thoriumlead
series isotopes Indicate whether the statement is true or false.