It is actually Group 3A elements. I just took the test.
the alkaline eart metal s are
Beryllium
Magnesium
calcium
Strontium
barium
out of these Magnesium reacts with oxygen and produces bright light due to formation of MgO
all other metals also form oxides but the oxide of Mg is brightest
Answer:red, orange, yellow, green, blue, indigo and violet.
Explanation:
Electrons move about the nucleus in defined orbits.
Explanation:
The Bohr mode of the atom was established based on the quantum mechanics originally developed by Planck.
- He suggested that the extranuclear part of the atom consists of electrons in specific spherical orbits around the nucleus. The orbits represents the principal energy levels.
The quantum theory was developed originally by Planck.
- He suggested energy exists in form of packets and discrete amount and not in form of flow like waves.
The quantum theory and Bohr mode in this regard as they both agree that electrons and energy are both quantized.
Learn more:
Bohr model brainly.com/question/4986277
#learnwithBrainly
