Examlex
Match the shape and number of electron groups at the central atom with the number of bonding pairs of electrons on the central atom.
-pyramidal, four
Operating a Business
The day-to-day activities involved in managing a company or enterprise, including production, marketing, and financial management.
Positive Selection
The evolutionary process by which alleles that confer beneficial traits or advantages increase in frequency in a population.
Low-armor Eda Allele
A genetic variant associated with reduced body armor in certain fish species, often studied in the context of adapting to different environmental pressures.
freshwater Stickleback
A small fish found in freshwater environments, often used in studies of evolution, ecology, and behavior.
Q12: Barium is an alkali earth metal.
Q12: Which reagent will be used up first
Q39: Identify the ion with a -3 charge.<br>A)
Q45: ethylene, C?H?<br>A)linear<br>B)trigonal plamar<br>C)tetrahedral<br>D)bent<br>E)trigonal planar<br>F)pyramidal
Q46: phosphorus trihydride<br>A)105°<br>B)107°<br>C)120°<br>D)118°<br>E)109.5°<br>F)180°
Q61: Calcium and barium have the same number
Q75: Which of the following is an example
Q79: Which of the following equations has 1:1:1:1
Q90: HCl<br>A)non-polar<br>B)polar
Q135: ammonium ion<br>A)linear<br>B)trigonal plamar<br>C)tetrahedral<br>D)bent<br>E)trigonal planar<br>F)pyramidal