How mant many electrons does iron have?

Shock metamorphism Choose one: A. causes quartz to recrystallize into marble. B. involves high temperatures and shear stress. C. probably hasn't happened on the Moon, because no products of shock metamorphism have been found in Moon regolith. D.

A drug company is testing the effectiveness of a new blood pressure medicine using rats as test subjects what are some possible factors that must remain constant during the testing?

Using the periodic table, which of the following elements has the most properties in common with calcium (Ca) ? potassium (K) magnesium (Mg) scandium (Sc) argon (Ar)

What are the element represented by [He]2s2

Are the chemical reactions that take place when a battery is connected endothermic or exothermic? Be specific as you explain your answer.

What is a property of a combustion reaction? A. Oxygen gas, O2, is a reactant. B. The products are simpler than the reactants. C. The reactants are simpler than the products. D. An uncombined element is on the reactant and product side.

For an endothermic reaction at equilibrium, the addition of a catalyst Group of answer choices causes no shift causes a shift to the right causes a shift to the left makes it an exothermic process

The atomic number of an element best corresponds to which of the following? O The mass of an atom of that element. O The number of electrons orbiting the nucleus of an atom of that element.

If a dinosaur once lived in mexico, and i now live in arkansas, can i be drinking the same water the dinosaur did?

Dough to which potassium bromate has been added rises better, producing a lighter, larger volume loaf.