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Pavel [41]
3 years ago
12

Which of the following statements statements expresses the following chemical equation with words?

Chemistry
1 answer:
nadezda [96]3 years ago
7 0

Answer:What are the two half reactions that show how many electrons are gained or lost by each species in the reaction:

Ni2+(aq) + Mg(s) → Ni(s) + Mg2+(aq)?

atoms cannot be created or destroyed in a chemical reaction

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Write electron configurations for Gallium, Ga (Z=31), and show the total valence electrons
ivann1987 [24]

<u>Answer:</u> The electronic configuration of gallium is written below and number of valence electrons is 3.

<u>Explanation:</u>

Electronic configuration is defined as the representation of electrons around the nucleus of an atom.

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Valence electrons are defined as the electrons present in the outermost shell of an atom.

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An element Gallium having atomic number as 31.

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Electronic configuration of Gallium is: (Z=31):1s^22s^22p^63s^23p^64s^23d^{10}4p^1

This element has 3 electrons in its outermost shell. So, the number of valence electrons is 3

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evablogger [386]

Answer: This comes to bear because of what is known as resonance effect Or mesomeric effect In chemistry.

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