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Vadim26 [7]
3 years ago
12

What ion will be formed by the selenium atom shown below when it has a stable set of valence electrons? Selenium atom A. Se6+ B.

Se2+ C. Se6− D. Se2−
Chemistry
1 answer:
ella [17]3 years ago
4 0
The ion that will be formed by the selenium atom shown below when it has a stable set of valence electrons is D) Se2-. 
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Answer:

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Explanation:

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3 0
1 year ago
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Which set of coefficients will balance this chemical equation?
Katarina [22]

Answer:

B 1,3

Explanation:

Count the atoms on each side of the arrow, they have to be equal

After arrow

2x C

6x O

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Before the arrow

2x C - correct, as it is the only compound with C then there must only be 1 mole of it.

This is also the correct amount of H

We need 6x O total so 6/2 = 3

So there are 3 moles of O

7 0
3 years ago
Describe and explain how petrol is separated from the mixture of hydrocarbons in crude oil?
leonid [27]
It's an exciting and interesting process but those 5 points aren't worth a decent answer. The whole process is called fractioned distillation where different temperatures are reached, transforming the crude oil in gas. After being hit by a cold source it colds becoming different hydrocarbons depending on the temperatures.
6 0
3 years ago
Which of the following is necessarily characterized by a covalent linkage?a. Base-pairing interactionb. Disulfide bondc. Hydroge
mr_godi [17]

Answer:

b. Disulfide bond

Explanation:

Covalent linkage or bonding is a type of bond in which electrons are shared between atoms in a compound or molecule. Each atom contributes to the shared electron.

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6 0
3 years ago
Write down the group numbers for carbon,oxygen,nitrogen and sulphur <br>​
Bess [88]

Answer:

Carbon - 14

Oxygen - 16

Nitrogen - 15

Sulphur - 16

Explanation:

The question above is related to the "Periodic Table of Elements" which shows the proper arrangement of elements in a table. Every element falls on a<em> group/family</em> within the table. Each group has its own number, and the table has a total of<u> 18 groups</u><em> (from left to right). </em>They are classified according to <em>similarities in their characteristics</em>. For example, group 1 is composed of <em>alkali metals</em> while group 2 is composed of<em> alkali earth metals</em>.

5 0
3 years ago
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