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3 years ago

Given an element with seven valence electrons, how many chemical bonds will usually form?

2 answers:

5 0

Answer : The element is belongs to the group 17 having the seven valence electrons and they will usually form one chemical bonds to another element.

Explanation :

As per given in the question that the element has seven valence electrons that means the seven electrons are present in their outermost energy level or shell.

Form the given information we conclude that, the group number is, 17 (because there are 7 valence electrons in outermost shell).

The elements belongs to group 17 are fluorine, chlorine, bromine and iodine and they are the halogens.

The general electronic configuration of halogens are, $ns^2np^5$ that means they have seven valence electrons in their outermost shell and they need only one electrons to complete their octet. So, they will usually form one chemical bonds by accepting one electrons from the other elements.

Hence, the element is belongs to the group 17 having the seven valence electrons and they will usually form one chemical bonds to another element.

Anna35 [415]3 years ago

4 0

Answer:

Explanation:

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How many moles are in 123.0g (NH4)2SO4

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Here you go! There are 0.9307 moles in 123.0 g of the compound. I solved this by using a fence post method. I calculated the number of grams in one mol of (NH4)2 SO4 and got 132.16.

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3 years ago

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Answer:

Explanation:

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Identify which statement describes the following process. 2Ce + 3Cu2+ → 3Cu + 2Ce3+

Georgia [21]

Answer: <span>A-Ce is oxidized because it is losing electrons and Cu is reduced because it is gaining electrons</span><span>.

</span>There are two reactions in the equation, oxidation and reduction. A molecule that oxidized will lose electrons while the molecule that reduced will gain electrons. In this case, Cu2+ changed into Cu which means its oxidation number reduced from +2 into 0. Ce oxidation number increased from 0 into +3

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3 years ago

The graphics below shows how photosynthesis and cellular respiration are related.

lisov135 [29]

Options found from another source are:

a. oxygen. b. glucose. c. energy stored as ATP. d. carbon dioxide and water

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c energy stored as ATP

Explanation:

Cellular respiration converts glucose into energy in the form of ATP (c). The answer cannot be oxygen (a), because this is required for this process as a final electron acceptor. In terms of photosynthesis, oxygen is released as a by-product. The answer cannot be glucose (b) because that is our starting point for respiration, and what is synthesised during photosynthesis. The answer cannot be (d) as carbon dioxide and water are released by cellular respiration, and required by photosynthesis

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