An element's atomic number is 87. how many protons would an atom of this element have

Making observation often involves: O A. finding answers, making predictions, and identifying problems. O B. asking questions, identifying problems, and gaining new information. O C. forming a hypothesis, asking questions, and writing articles. O D.

How many carbons atoms are in propane?

Zinc dissolves in hydrochloric acid to yield hydrogen gas: zn (s) + 2hcl (aq) → zncl2 (aq) + h2 (g) when a 12.7 g chunk of zinc dissolves in 500. ml of 1.450 m hcl, what is the concentration of hydrogen ions remaining in the final solution?

What would have happened to your results if during the dehydration some of the copper (ii) sulfate splatter out of the crucible - would your results show more, less, or the same amount of water in the hydrate?

What are the main parts of chocolate milk

The mass flow rate of gasoline leaving a refinery is 1610 kg/min. The specific gravity of a gasoline is 0.700. A retail gasoline pump is able to fill a 20.0 gallon automobile tank in 1.80 minutes.

Calculate the solubility of cux (ksp=[cu2+][x2-]=1.27*10-36) in a solution that is 0.190 m in nacn.

An atom has seven valance electrons which element could have this type of atom

How is the ocean important to human survival? restate the question

A sample of pure lithium contains 7.99% lithium by mass. What is the % lithium by mass in a sample of pure lithium nitrate that has twice the mass of the first sample?