U1: Measurements and Calculations
This is the following number in standard notation: 4.385 x 10-9.
What is 0.000000004385?
This is the number of oxygen atoms in the following compound: Al(NO3)3.
What is 9?
This is the value and unit for the speed of light.
What is 2.998 x 108 m/s?
This is the maximum number of electrons that can be in 1 orbital.
What is 2?
This is the formula for aluminum sulfide.
What is Al2S3?
This is the SI base unit for solid volume.
What is cubic centimeters (cm3)?
This is a postulate of Dalton's atomic theory that is no longer considered to be true.
What is "all atoms of a given element are identical" or "atoms are indivisible in chemical processes"?
These are the two values that must be multiplied to calculate the amount of energy carried by an electromagnetic wave.
What are frequency (v) and Planck's constant (h)?
This is the number of orbitals in an f sublevel?
What is 7?
This is the name of FeCl3.
What is iron (III) chloride?
This is the number of significant figures in 0.030500.
What is 5?
This chemist discovered the nucleus with his experiment using gold foil.
Who is Ernest Rutherford?
This happens when electrons absorb energy.
What is "move to a higher energy level" or "move to an excited state"?
This is the type of orbital that is dumbbell-shaped.
What is a p orbital?
This is the chemical formula for ammonium phosphate.
What is (NH4)3PO4?
This is the answer to the following, reported to the correct number of significant figures:
480.35 + 39.555 .
What is 519.91?
This is the name for the elements in group 5A.
What are the pnictogens?
This is the wavelength (in nm) associated with a frequency of 5.47 x 1014 Hz.
What is 548 nm?
This is the number of unpaired electrons in a nitrogen atom in its ground state.
What is 3?
This is the name of N2O5.
What is dinitrogen pentoxide?
This is the number of centimeters in 3.4 miles reported to the correct number of significant figures.
What is 550,000 cm?
This is the number of neutrons in an atom of uranium-235.
What is 143?
This is the energy associated with a wavelength of 650 nm.
What is 3.06 x 10-19 J?
This is the noble gas configuration for bismuth.
What is [Xe] 6s2 4f14 5d10 6p3?
Elements in group 2A would combine in equal numbers with elements from this group to form ionic compounds.
What is group 6A?