The half-life for the radioactive decay of calcium-47 is 4.5 days. how many half-lives have elapsed after 27 days?

The outer electron configuration of a group 3A element is a. ns1np2 b. ns2np2 c. ns1np1 d. ns2np1

I'm doing isotope homework and I need the find the number of protons, neutrons, and electrons first one is chromium-58 and chromium-63

An investigation that is controlled is what

Which of these chemical formulas-kcl, xe, co2, or h2-represents both an element and a molecule?

Which statement is true about tomato juice? A) It is an acid. B) It has a pH of 7.0. C) It is strongly basic in nature. D) It is a weak hydrophobic substance.

Will mark as Brainliest. How much energy is released when 16.5 g of steam is condensed at 100 degrees Celsius? -37290 J -3729 J -136 J -136 kJ

What is the mole fraction, x, of solute and the molality for an aqueous solution that is 16.0 % NaOH by mass

What is the square root of 54554? What is the square root of 35654?

Halogens have ... Electron affinity

Observe: Change the Surface area from Minimum to Maximum. You can imagine that a solid reactant has been dissolved in a liquid. How does this change how many Reactant B molecules are exposed to Reactant A?