How do I figure out how many valance electrons an element has?

Which of the following could have a negative impact on science

Suppose the fluid in the stomach of a man suffering from indigestion can be considered to be 200. ml of a 0.033 m hcl solution. what mass of nahco3 would he need to ingest to neutralize this much hcl

Choose the statement below that is TRUE? A) A solution will form between two substances only if the solvent-solvent interactions are weak enough to overcome the solute-solvent interactions.

Given the energy of x-radiation below, determine the wavelength." egy 4.97 x 10-17)

What is a common property of metals? a) insulates from electricity b) conducts electricity c) has very little reactivity d) is liquid at room temperature

Name 5 types of alloys

What is the 3 types of matters

A sunflower turns its head toward sunlight. What triggers this behavior in a sunflower? gravity phototropism presence of nutrients presence of water

Enter your answer in the provided box. A sample of an unknown gas effuses in 14.5 min. An equal volume of H2 in the same apparatus under the same conditions effuses in 2.42 min. What is the molar mass of the unknown gas

What volume will 0.710 moles of nitrogen gas occupy at STP?