What isotope remains after the alpha decau of uranium-238?

How to combine elements to make compounds?

How many electrons make up a charge of - 50.0 μc? Express your answer using three significant figures?

3. Identify the oxidizing agent in each of the fol- lowing reactions. a) Cu2 + (aq) + Mg (s) + Cu (s) + Mg2 + (aq) b) Fe, O3 (s) + 3CO (g) → 2Fe (1) + 3CO, (g)

Only 235u can be used as fuel in a nuclear reactor, so uranium for use in the nuclear industry must be enriched in this isotope. if a sample of enriched uranium has an average atomic mass of 237.482 amu, what percentage of 235u is present?

Is the formula FE a element, compound, or molecule

Student follow up The ionic equation for the reaction between zinc and sulfuric acid is. Zn (s) + 2H (aq) - - Zn" (aq) + H2 (g) a State what has been oxidised in this reaction. Explain your answer in terms of electrons.

What kind of group 1 atoms are the most reactive? a. Small atoms c. Atoms with the most electrons in the valence level b. Large atoms d. Atoms at the top of the periodic table

What does it mean when there are 2.3 x 10-4 moles?

Electric force is an A. attraction and repulsion between protons and electrons . B. attraction and repulsion between protons and neutrons. C. attraction and repulsion between neutrons and electrons.

A salt crystal has a mass of 0.18 mg. how many nacl formula units does it contain?