Chemistry, 12.03.2021 15:40 Geo777

Write the electron configuration for . (Express your answer as a series of orbitals, in order of increasing orbital energy. For example, the electron configuration of Li would be entered as 1s22s1 or [He]2s1.) Write the electron configuration for . (Express your answer as a series of orbitals, in order of increasing orbital energy. For example, the electron configuration of Li would be entered as 1s22s1 or [He]2s1.) Write the electron configuration for . (Express your answer as a series of orbitals, in order of increasing orbital energy. For example, the electron configuration of Li would be entered as 1s22s1 or [He]2s1.) Write the electron configuration for . (Express your answer as a series of orbitals, in order of increasing orbital energy. For example, the electron configuration of Li would be entered as 1s22s1 or [He]2s1.)

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Answer from: ash011519

The given question is incomplete. The complete question is:

Write the electron configuration for Ca^+ . (Express your answer as a series of orbitals, in order of increasing orbital energy. For example, the electron configuration of Li would be entered as 1s22s1 or [He]2s1.) Write the electron configuration for $Ca^{2+}$ . (Express your answer as a series of orbitals, in order of increasing orbital energy. For example, the electron configuration of Li would be entered as 1s22s1 or [He]2s1.) Write the electron configuration for $Se^{2-}$ . (Express your answer as a series of orbitals, in order of increasing orbital energy. For example, the electron configuration of Li would be entered as 1s22s1 or [He]2s1.) Write the electron configuration for $S^{2-}$ . (Express your answer as a series of orbitals, in order of increasing orbital energy. For example, the electron configuration of Li would be entered as 1s22s1 or [He]2s1.)

Ca^+:19:[Ar]4s^1

$Ca^{2+}:18:[Ar]$

$Se^{2-}:32:[Ar]3d^{10}4s^24p^2$

$S^{2-}:18:[Ar]$

Explanation:

Electronic configuration represents the total number of electrons that a neutral element contains. We add all the superscripts to know the number of electrons in an atom.

The electrons are filled according to Afbau's rule in order of increasing energies. The positively charged species are formed by loss of electrons and negatively charged species are formed by gain of electrons.

Ca:20:[Ar]4s^2

Ca^+:19:[Ar]4s^1

$Ca^{2+}:18:[Ar]$

$Se:34:[Ar]3d^{10}4s^24p^4$

$Se^{2-}:36:[Ar]3d^{10}4s^24p^6$ or $Se^{2-}:36:[Kr]$

S:16:[Ne]3s^23p^4

$S^{2-}:18:[Ne]3s^23p^6$ or $S^{2-}:18:[Ar]$

Answer from: Quest

Answer : option c) heat is released during the process.explanation :

the enthalpy of formation of water is given as -285.8kj/mol, which states that the enthalpy of formation is negative.

negative enthalpy of formation indicates that the heat is released during the reaction process. the heat is released from reaction to the surroundings the enthalpy is expressed with a negative sign with the energy given out in the reaction process.

the formation of water takes place by giving out heat which is -285.8 kj/mol.

Answer from: Quest

1.75 is the weight of one medium egg