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sergey [27]
3 years ago
14

How many single covalent bonds must a silicon atom form to have a complete octet in its valence shell? how many single covalent

bonds must a silicon atom form to have a complete octet in its valence shell? 0 3 1 2 4?
Chemistry
1 answer:
omeli [17]3 years ago
8 0
Silicon must have 4 single covalent bond, every single bond has 2 electrons (one pair), so 4·2=8 electrons (octet).
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How many moles are in 3.2x10^23 atoms of francium?
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Explanation:

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The model of a “sea of electrons” helps explain ____.
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The correct answer is C.) metallic bonds

Explanation:

Metallic bonds are formed between metal compounds and are very strong. These links are explained by the "sea model of electrons", where valence electrons are ceded by each metal atom, becoming positive ions forming a three-dimensional crystalline network. These electrons move forming a network ("sea") that allows the union of the positive ions formed.

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Which of these are ionic compounds? Check all that apply.
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What is the density of an object if its mass is 10 g and a volume of 2 mL?
Lilit [14]

Hi there! Let's solve this problem shall we!

⠀Volume = 10g

      Mass = 2 mL

In this specific problem, they are asking us to find the <u><em>density </em></u>of the object. So,<u><em> using the information given to us</em></u> (volume and mass), let's solve the problem!

Now, if you remember, D = M ÷ V

So, let's fill in the blanks!

D = Our unknown value

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Here is the filled out formula:

D = M ÷ V

D = 2mL ÷ 10g

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*Make sure you put the units for your final solution!*

4 0
1 year ago
What is the difference between atomic mass, relative atomic mass and average atomic mass
vesna_86 [32]

\bold{\huge{\underline{\purple{ Answer }}}}

<u>Difference </u><u>between </u><u>Atomic </u><u>mass</u><u>, </u><u>relative </u><u>atomic </u><u>mass </u><u>and </u><u>average </u><u>atomic </u><u>mass</u><u> </u><u>:</u><u>-</u>

<h3><u>Atomic </u><u>Mass </u><u>:</u><u>-</u></h3>

  • Atomic mass is the mass of neutrons and protons present in the nucleus of an atom .
  • It is always calculated for a single element and having direct value
  • For isotopes also, the atomic mass is calculated separately . Example :- <u>Carbon </u><u>1</u><u>2</u><u> </u><u>,</u><u> </u><u>carbon </u><u>1</u><u>3</u><u> </u><u>and </u><u>carbon </u><u>1</u><u>4</u><u> </u><u>have </u><u>different </u><u>atomic </u><u>mass</u><u>. </u>
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<h3><u>Relative </u><u>Atomic </u><u>mass </u><u>:</u><u>-</u></h3>

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<h3><u>Average </u><u>Atomic </u><u>Mass </u><u>:</u><u>-</u></h3>

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  • The unit of Average atomic mass is "Amu" or " u " .
5 0
2 years ago
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