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Semenov [28]
4 years ago
12

Considering the nonmetals what is the relationship between the group number for an element (carbon, for example, belongs to grou

p 4a; see the periodic table on the inside front cover) and the number of single covalent bonds that element needs to form to conform to the octet rule
Chemistry
1 answer:
vlada-n [284]4 years ago
6 0
The Octet rule is essential to obey nature's law of stability. Among all the elements in the periodic table, the noble gases in Group 8 are the most stable in. Hence, all the other elements aim to achieve their electronic configuration. So, all elements must bond with others to conform to be a part of group 8. 

<em>Bonds for non metals = 8 - Group number</em>
Ex:
Bonds for oxygen = 8 - 4 = 4
Bonds for nitrogen = 8 - 5 = 3
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Rank the following elements by electron affinity, from most positive to most negative EA value. Rank from most positive to most
Svetlanka [38]

Answer:

Most positive = rubidium

Most negative = fluorine

Explanation:

Electron affinity of an element is the energy released when an electron is attached to a neural atom to form an ion in its gaseous state.

X + e⁻ → X⁻

Electron affinity is similar to electronegativity which is the tendency at which an atom accepts an ion towards itself.

Electron affinity increases across the period and decreases down the group in the periodic table.

In the above option,

Fluorine has the highest electron affinity

Rubidium has the lowest electron affinity

Tellurium and then finally Phosphorus

Helium in this case would have the lowest electron affinity because it has filled orbital and does not require any electron to attain stability. Technically, Helium has the lowest or is expected to have the lowest electron affinity which is close to zero according to quantum mechanics.

Most positive = rubidium

Most negative = fluorine.

You can check periodic table for their exact values

6 0
4 years ago
Determine if the following two structures are
Finger [1]

Answer:

its C

Explanation:

5 0
3 years ago
Which of the following best explains velocity?
zhannawk [14.2K]
Velocity is explained as the *speed and *direction something might move.  Speed means moving and Direction means a certain way (not stationary.)

Hope this helps!
8 0
3 years ago
You have a saturated solution of BaSO4, a slightly soluble ionic compound. What happens if you add Ba(OH)2, NaNO3, and CuSO4 to
igomit [66]

Answer:

- Addition of Ba(OH)2: favors the formation of a precipitate.

- Undergo a chemical reaction forming soluble species.

- Addition of CuSO4 : favors the formation of a precipitate.

Explanation:

Hello,

In this case, since the dissociation reaction of barium sulfate is:

BaSO_4(s)\rightleftharpoons Ba^{2+}(aq)+SO_4^{2-}(aq)

We must analyze the effect of the common ion:

- By adding barium hydroxide, more barium ions will be added to the equilibrium system so the formation of solid barium sulfate will be favored (reaction shifts leftwards towards reactants).

- By adding sodium nitrate, the following reaction will undergo:

BaSO_4(s)+NaNO_3(aq)\rightarrow Ba(NO_3)_2(aq)+Na_2SO_4(aq)

So the precipitate will turn into other soluble species.

- By adding copper (II) sulfate, more sulfate ions will be added to the equilibrium system so the formation of solid barium sulfate will be favored (reaction shifts leftwards towards reactants).

All of this is supported by the Le Chatelier's principle.

Best regards.

7 0
3 years ago
Which section of the reaction represents the reactants
Diano4ka-milaya [45]
A should be the products and D should be the reactants. So D should be the answer.
8 0
3 years ago
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