Which type of orbits are found in the principal energy level n = 2

A - s

B - s, f

C - s, d

D - s, p

E - s, p, d

A galvanic (voltaic) cell has the generic metals X and Y as electrodes. X is more reactive than Y, that is, X more readily reacts to form a cation than Y does. Classify the descriptions by whether they apply to the X or Y electrode.

1. The red light associated with the aurora borealis is emitted by excited oxygen atoms. This light has and energy wave that has a wavelength that measures 630.0 nm. a. What is the frequency of the light? b.

What do the orange and yellow spheres represent in this model of an atomic nucleus?

Which would be the best way to represent the concentration of a 1.75 M K2CrO4 solution?

A good way for someone to identify similar substances is to measure their densities true or false

Marissa is learning about the unique properties of waves. She has learned that whenever the wavelength of a wave increases, the frequency of the wave decreases.

Which answer choice best explains why uranium-238 can be used in power plants to generate electricity? A) Nuclides of uranium-238 decay over time. They release large amounts of energy as their nuclei break apart.

Explain how you can use physical properties to compare substances.

How is this model useful?

What is the frequency of a wave? A. The amount of time that one full cycle takes B. The distance traveled by the wave during one full cycle C. The amount of cycles that occur in a given time D. The distance from the beginning to the end of a cycle