How many resonance structures does NH3 have?

I believe that there are none, but I would like some confirmation ...

What is simplest level at which life may exist

In which of these bonding patterns does x not obey the octet rule?

What information is shown in an atom's electron dot diagram? the number of shells an atom has the number of electrons in each shell of an atom the number of valence electrons an atom has the number of valence shells of an atom

An electron is in a region outside the nucleus

The table shows the properties of some organic compounds. Compound A: has only carbon and hydrogen atoms.

Letters B and C on this model show us daytime on Earth. Both locations have daytime because of A) Earth's tilt on its axis. B) Earth's orbit around the sun. C) Earth's rotation on its axis. D) Earth's distance from the sun.

Blanking and Punching size:A compound die will be used to blank and punch a large washer out of 6061ST aluminum alloy sheet stock 3.80 mm thick. The outside diameter of the washer is 60.0 mm and the inside diameter is 28.0 mm.

Whats the difference between china and Europe

Iodine pentafluoride gas reacts with iodine fluoride gas producing iodine heptafluoride gas and iodine gas. What is the maximum number of grams of iodine gas that can be produced from a reaction of 10.0 g of iodine pentafluoride with 11.

What evidence of a chemical reaction might you see in dropping an Alka-Seltzer tablet into a glass of water?