What are the symbol, name, and atomic number of the element that has 21 protons in the nuclei of its atoms?

Which of the following would be the best name for MgCl2?

If the electronegativity difference between elements x and y is 2.1, the bond between the elements x-y is

In two or more complete sentences explain how to balance the chemical equation, Ca + N2 ⟶ Ca3 + N2 and include all steps.

If atoms are not destroyed, what happens to them

Why NaCl not expected to produce a gas when tested with HCL?

Nonmetal oxides can react with water to form acids. For example, carbon dioxide reacts with water to form carbonic acid: CO2 H2O H2CO3. (1) Write an equation to show how diiodine pentaoxide reacts with water to form an acid. Do not include states.

If atmospheric pressure suddenly changes from 1.00 atm to 0.892 atm at 298 k, how much oxygen will be released from 4.40 l of water in an unsealed container?

Determine the molecular formula for the unknown if the molecular mass is 60.0 amu and the empirical formula is ch2o.

Draw the organic product of the following nucleophilic reaction

How does the energy of the activated complex compare with the energies of reactants and products? select one: a. it is lower than the energy of both reactants and products. b.