Which electron configuration represents an excited state for an atom for calcium

1. 2-8-7-1

2. 2-8-7-2

3. 2-8-7-3

4. 2-8-8-2

In an oversight in the experiment jamie did not add the 4-5 additional drop of 6M JNO3. as result, will the reported number of moles of oxygen be too high or too low in the final product? explain.

Write the full ground state electron configuration of co3 + in abbreviated form

A voltaic cell consists of a strip of cadmium metal in a solution of cd (no3) 2 in one beaker, and in the other beaker a platinum electrode is immersed in a nacl solution, with cl2 gas bubbled around the electrode.

One afternoon, Anne leaves her house and walks 5 blocks north to the post office. Then she walks 2 blocks north to the bank. Finally, she walka 3 blocks south to the coffee shop. Where is the coffee shop relative to her house? A.

In the chemical formula 3NH4, how many total atoms of hydrogen (H) are there?

Should a bartender use ice and scoop directly from ice machine or use an ice holding device and scoop to make drinks and refill drinks from

What classification should this reaction have? 4Al + 3O2 → 2Al2O3

If you start with 100 grams of a radionuclide, how much will you have after two half-lives have passed?

Identify the spectator ions in the following complete ionic equation. 2k (aq) s2 - (aq) pb2 (aq) 2no-3 (aq) →pbs (s) 2k (aq) 2no-3 (aq) express your answers as ions separated by a comma.

4. A bird left its post and flew in a triangular path. It flew 21 yards south, 72 yards east and 75 yards diagonally to end back at the post. Is it a right triangle?