According to periodic table which elements has seven valence electrons

What phases are most common at high temperatures

What is the ratio of Fe3 + ions to O2 - ions in a neutral compound? 1:2 2:1 2:3 3:2,

Alchemist made which of the following contributions to the development of chemistry?

A student prepares 150.0 mL of 1.40 M HCl using 35.0 mL of a stock solution. What is the concentration of the stock solution?

Which of the following is necessary to do a complete stoichiometric calculation? A) Add the nuclear masses of the products. B) Divide the nuclear masses of the reactants. C) Write the complete balanced chemical equation.

Hat information is needed to determine the energy of an electron in a many-electron atom?

Write the formulas for the following compounds: (a) copper (l) cyanide, (b) strontium chlorite, (c) perbromic acid, (d) hydroiodic acid, (e) disodium ammonium phosphate, (f) potassium dihydrogen phosphate, (g) iodine heptafluoride, (h)

Name a complex salt used in silver-playing.

10. In what part of the world might you find Mystery Island (note: you will be given full-credit for simply attempting this question and you will find the actual answer in your teacher's feedback). Do not answer!

What are the spectator ions in this equation?