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A strontium-90 atom that has lost 2 electrons has ________ protons, ________ neutrons, and ________ electrons.

K+, Cl-, and S2- are isoelectronic with which atom?

Indicate if each of the following is an example of potential energy or kinetic energy. A) Oxygen molecules moving at 650 m/s at room temperature is [A] energy. B) A skier at the top of a ski hill is [B] energy. C) Vibrating gold atoms in a piece of jewelry is [C] energy.

When is a noncommercial applicator license required?

As the frequency of electromagnetic radiation decreases, which statement below is TRUE?

Each week on Thursdays we will have a required Zoom check-in. There will be multiple check-in times available; chose the one that works best for you! Times and Zoom links are on the course homepage next to the photos of the instructors. During the Zoom check-ins you can expect to:

The electron configuration of a cobalt (Co) ion is [Ar] 3d5. What is the charge on this ion?

What is the charge on the titanium ion in TiO2?

A line in the emission spectrum of aluminum has a frequency of 7.57 x 1014 Hz.  Which is true about the emitted radiation:

One isotope of silicon makes up 92% of silicon atoms. Which one?