HELP!!! I have like 20 of these kinds of questions on my homework and no clue how to solve them.

Electron capture transforms 40 K 19 into what nuclide?!?!

Thank you

look at the definitions for each type of reaction. For instance, electron capture must reduce the atomic number from +19 to 18, and not change the atomic mass number.

40 ?? 18

Go through each type of reaction with the definition of that reaction, and apply it to the atomic number and atomic mass.

Oh okay so for this one would it be:

40 Ar 18????

thanks so much for your help!

To determine the nuclide resulting from electron capture, you need to understand the process involved. In electron capture, an atom's nucleus absorbs an inner shell electron (usually from the K or L shells), resulting in the transformation of a proton into a neutron. Here's how you can solve this problem:

Step 1: Find the atomic number of the starting nuclide (K) on the periodic table. In this case, potassium (K) has an atomic number of 19.

Step 2: Identify the nuclide formed by subtracting one from the atomic number. For electron capture, the atomic number decreases by one because a proton transforms into a neutron. Therefore, the atomic number of the resulting nuclide is 18.

Step 3: Find the corresponding element for the resulting atomic number on the periodic table. An element with atomic number 18 is argon (Ar).

So, electron capture transforms 40K19 into the nuclide argon-40 (40Ar18).

If you have similar questions for other nuclides, you can follow the same steps – identifying the atomic number, subtracting one to find the new atomic number, and determining the corresponding element.