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vekshin1
4 years ago
9

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

Chemistry
2 answers:
aleksandrvk [35]4 years ago
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]4 years ago
4 0

Answer:

a

Explanation:

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slava [35]

Answer:

A) igneous rocks

Explanation:

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4 years ago
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A 0.67 gram sample of chromium is reacted with sulfur. The resulting chromium sulfide has a mass of 1.2888 grams. What is the em
spin [16.1K]

Answer:

Cr₂S₃

Explanation:

From the question given above, the following data were obtained:

Mass of chromium (Cr) = 0.67 g

Mass of chromium sulfide = 1.2888 g

Empirical formula =?

Next, we shall determine the mass of sulphur (S) in the compound. This can be obtained as follow:

Mass of chromium (Cr) = 0.67 g

Mass of chromium sulfide = 1.2888 g

Mass of sulphur (S) =?

Mass of S = (Mass of chromium sulfide) – (Mass of Cr)

Mass of S = 1.2888 – 0.67

Mass of S = 0.6188 g

Finally, we shall determine the empirical formula of the compound. This can be obtained as follow:

Mass of Cr = 0.67 g

Mass of S = 0.6188 g

Divide by their molar mass

Cr = 0.67 / 52 = 0.013

S = 0.6188 / 32 = 0.019

Divide by the smallest

Cr = 0.013 / 0.013 = 1

S = 0.019 / 0.013 = 1.46

Multiply by 2 to express in whole number

Cr = 1 × 2 = 2

S = 1.46 × 2 = 3

Therefore, the empirical formula of the compound is Cr₂S₃

5 0
3 years ago
Which of the following methods can be used to completely separate a solution containing alcohol and water?
SOVA2 [1]

Answer:

evaporation and distillation

Explanation:

the liquids have different booking points that is why it works

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3 years ago
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In what situations are van der waals forces the most significant
viktelen [127]
Its most significant when all other forces are absent
7 0
3 years ago
12. (06.01 MC)
qaws [65]

Answer:

Elastic collisions between gas particles: Ideal gases are assumed to interact via perfectly elastic collisions in which no energy is lost. Intermolecular forces describe the attraction and repulsion between particles. They include: Instantaneous dipole-induced dipole forces or London dispersion forces.

Explanation:

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3 years ago
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