A neutral atom of silicon-30 contains 14 protons. How many electrons does it have?

What element in the 3rd period will form an ionic compound with a 1:1 atom ratio with magnesium?

What would happen when a substance changes from one phase to another? A. The substance loses or gains heat. B. The average kinetic energy of the substance changes. C. The temperature of the substance changes. D.

The actual volume of the object was 34.1 mL. What is the percent error of his average result?

How do you solve the problems of SO2?

Is the element silver widely used in density

Write a balanced chemical equation for the complete combustion of C3H7BO3, a gasoline additive. The products of combustion are CO2 (g), H2O (g), and B2O3 (s).

Which of the following polymers is used in plastic bottles and plastic containers? Select one: a. LDPE b. PVC c. Polystyrene d. HDPE e. Polypropylene

Which of the following statement is not true? A) The sun is involved in producing tides B) There can be two high tides in one location during a single day C) Only the oceans have tides D) If there is a high tide, there will be a low tide

A solution which has a concentration that exceeds its predicted solubility at a certain temperature and pressure would be -

Convert 4.992*1010 g to each of the following units. B. Mg c. mg D. metric tons