A non-metal usually forms 2 covalent bonds in its compounds.How many electrons will it take in its valence shell？

Answers

Answer 1

Answer:

It will take 8 electrons in its valence shell.

.How many electrons will it take in its valence shell？

This non-metal usually forms 2 covalent bonds. This leads me to believe that it has 6 valence electrons, to begin with, and will take 2 more, one from each bond. Such that it ends with a full valence shell of 8 electrons.

In covalent bonds, non-metals share electrons to attain full valence shells.

How many electrons are present in nonmetal in their outermost shell?

Most of the non-metals have 4 to 7 electrons in their valence shells. Formation of ions: Non-metals tend to accept electrons in their valence shell to form negatively charged ions called anions.

Learn more about valence shell here: brainly.com/question/15076797

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Answer 2

Answer:

In covalent bonds, non-metals share electrons to attain full valence shells.

This non-metal usually forms 2 covalent bonds. This leads me to believe that it has 6 valence electrons to begin with and will take 2 more, one from each bonds. Such that it ends with a full valence shell of 8 electrons.

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An atom of carbon-12 and an atom of carbon-14 differ in(1) atomic number(2) mass number(3) nuclear charge(4) number of electrons

Answers

Answer:

The correct answer is option (2).

Explanation:

Carbon-12:

Atomic Number = 6

Mass number = 12

Nuclear charge = number of protons = +6

Number of electrons = 6

Carbon-14:

Atomic Number = 6

Mass number = 14

Nuclear charge = number of protons = +6

Number of electrons = 6

An atom of carbon-12 and an atom of carbon-14 only differ in their mass number as C-12 has mass number of 12 and C-14 has mass number of 14.

(2) mass number
the number after the two carbons is the mass number, the two carbons are different isotopes of each other
isotopes have the same number of protons but different number of neutrons, neutrons and protons make up the atomic mass number, so if you add neutrons to the atom the mass number increases
i hope that makes sense!

Calculate the hydrogen-ion concentration [H+] for the aqueous solution in which [OH–] is 1 x 10–11 mol/L. Is this solution acidic, basic, or neutral? Show all work.

Answers

If we have $[H+][OH-]= Kw = 1.0 x 10^-14$
Then $[H+]= Kw/ [OH-]= 1.0x 10^-14$ $/ 1 x 10^-11 =1 x 10^-3 mol/L$
And here is the solution - as you can see it is an acidic one :
$pH = - log [H+]= - log 1 x 10^-3 = 3 \ \textless \ 7$

I am pretty sure this answer will help you! Regards.

which of the molecules listed below directly donates a nitrogen atom for the formation of urea during the urea cycle?

Answers

Aspartate directly donates a nitrogen atom from the formation of urea during the urea cycle.
The argininosuccinate synthase reeaction links aspartate and citrulline via the amino group of aspartate and provides the second nitrogen of urea.

Which of the following materials is not considered to be a semiconductor? germanium tin silicon aluminum

Answers

Tin and Aluminum are not considered as semiconductors but rather conductors themselves because they are metals. Semiconductors are in general elements from column IV or or compounds of columns III and V of the periodic table.

Germanium and silicon are semiconductors because they are metalloids.

Aluminium is not considered to be a semiconductor.

How does the number of products in a synthesis reaction compare with the number of reactants? A) the number of products is greater than the number of reactants
B) the number of products is less that the number of reactants
C) the number of products is the same as the number of reactants
D) the number of products may be greater or less than the number of reactants

Answers

Answer: The correct answer is Option B.

Explanation:

Synthesis reaction is defined as the reaction in which two or more substances combine in their elemental state to form a single compound.

The general equation representing this reaction follows:

$A+B\rightarrow AB$

As, number of reactants in this type of reaction will always be more bacuse a single product is forming in this reaction.

Thus, the correct answer is Option B.

Why did Rutherford conclude that the atom was mostly empty space?

Answers

Rutherford came to this conclusion after his Gold-Foil experiment. He found that most of the alpha particales(when released) went straight through the gold foil, of which consisted of atoms. In the middle of the atom theres a small nucleus that has mass and positive charge. Because the nucleus is so small the alpha particles were able to go straight through leading to the conclusion that atoms are mostly empty space.

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