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Sophie [7]
3 years ago
10

The most active of all the chemical elements is a halogen known as

Chemistry
2 answers:
kkurt [141]3 years ago
5 0
I personally thought flourine. That is because it contains less outer shell electrons than the other elements. This results in the element being able to attract another electron (becoming stable) more easily.
rodikova [14]3 years ago
3 0
Astatine. Because it has the smaller shell of electrons. I believe
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What is a nuclear acid ​
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Nucleic acid is an important class of macromolecules found in all cells and viruses. Deoxyribonucleic acid (DNA) encodes the information the cell needs to make proteins.

A related type of nucleic acid, called ribonucleic acid (RNA), comes in different molecular forms that participate in protein synthesis.

8 0
2 years ago
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An atom with 13 protons and an unknown number of neutrons is called____?
MaRussiya [10]
Aluminum contains 13 protons
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3 years ago
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Which ion is formed when an atom of fluorine (f) gains one electron? f–1 f–2 f 1 f 2
gregori [183]

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If a fluorine atom gains an electron, it becomes a fluoride ion with an electric charge of -1.

Explanation:

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6 0
2 years ago
A 0. 462 g sample of a monoprotic acid is dissolved in water and titrated with 0. 180 m koh. what is the molar mass of the acid
Len [333]

The molar mass of the acid if 28. 5 ml of the koh solution is required to neutralize the sample is 90.23g/mol.

<h3>For the calculation of molarity of solution</h3>

Molarity = (moles of solute/volume of solution) × 1000

Given,

Molarity of KOH solution = 0.180 M

Volume of solution = 28.5 mL

0.180 = (moles of KOH/ 28.5) × 1000

Moles = (0.18× 28.5)/1000

= 0.00513 mol

<h3>Chemical equation for the reaction</h3>

HA + KOH ------- KA + H2O

1 moles of KOH reacts with 1 moles of HA.

So, 0.00513 moles of KOH react with 0.00513 moles of HA.

<h3>To calculate the molar mass for given number of moles</h3>

Number of moles= given mass/ Molar mass

Given,

Mass of HA = 0.462 g

Moles of HA = 0.00512 mol

0.00512 = 0.462/ Molar mass

Molar mass = 90.23 g/ mol.

Thus the molar mass of HA required to neutralize the 28.5 mL of KOH is 90.23g/mol.

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brainly.com/question/26416088

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3 0
1 year ago
When a barium atom loses two electrons what charge does it have
Darya [45]

Answer:

It becomes a positive ion and its radius decreases

Explanation:

As per the Octet rule, Barium has 2 electrons in its outermost shell. When it loses the two electron it gains two positive charge i.e Ba2+. As the barium loses the two electron from its outermost shell, the outermost shell becomes vacant and thus is no more considered as a part of atomic geometry of the barium atom and since the outermost shell is considered negligible the radius of barium atom reduces automatically.  

6 0
3 years ago
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