What has56 protons and 54 electrons and 74 neutrons

The valence electrons in an atom of phosphorus in the ground state are all found in (1) the first shell (2) the second shell (3) the third shell (4) the fourth shell

Which element forms compounds which are involved in smog and acid rain? A. Carbon B. Boron C. Nitrogen D. Chlorine E. Flourine

Which of the following molecule (s) is (are) polar? CO2, CH4, CBr4, or CHBr3

A sample of 97 g of NaCl is dissolved to make 2 L of solution. What is the molarity of the solution? Molarity = Moles of solute/liters of solution Hint: You need to calculate the moles from the grams given first A. 1.66 M B. 0.83 M C. 48.5 M D. 97 M

How many moles of dinitrogen tetrahydride are equivalent to 120 grams?

Below are the steps of the engineering process (not necessarily in order) : 1) Know the background 2) Do the work 3) Make a plan 4) Identify a need 5) Evaluate and redesign 6) Test the results What is the correct order for these steps? APEX

Define "Homoglycan" and "Heteroglycan" and give an example of each

If you have 200 grams of iodine how many atoms do you have?

Sea salt is formed by natural evaporation of ocean water and contains 98% sodium chloride. The remaining 2% are natural minerals such as iron and sulfur. Consider a 84.7-g sample of sea salt.

Which element in group 15 is the strongest metallic character?