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Which element has atoms with valence electrons in a higher energy level than those of calcium (Ca)?

enyata [817]

Here, we are required to determine which element has atoms with Valence electrons in a higher energy level than those of calcium.

The Valence electrons of the Caesium, Cs atoms has higher energy level than those of Calcium.

First, we need to determine the electronic configuration of each of the elements

Therefore the Calcium electron configuration will be:
1s²2s²2p⁶3s²3p⁶4s²

Therefore, for Cs Electron Configuration:
1s² 2s²2p⁶3s²3p⁶3d¹⁰ 4s²4p⁶4d¹⁰ 5s²5p⁶ 6s¹
Therefore, For lithium, The electron configuration of lithium is :
1s²2s¹

For oxygen, Therefore the O electron configuration will be:
1s²2s²2p⁴

For bromine, the electronic configuration is 1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p⁵

Among the elements in the option, the Valence electrons of the Caesium, Cs atoms has higher energy level than those of Calcium.

This is so because the only Valence electron of Cs is located in the 6s orbital and as such has the highest energy level amongst all of the elements.

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3 years ago

Grain is pouring into a silo to be stored for later use. Due to the friction between pieces of grain as they rub against each ot

jolli1 [7]

Answer:

The electric force between them if the pieces of grain are 2 cm apart is $3.15\times 10^{-11}\textrm{ N}$ .