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3 years ago

What is the octet rule?

Chemistry

2 answers:

solong [7]3 years ago

7 0

The octet rule says that atoms need to have full valence shells to become stable.

Most atoms need eight electrons to fill their valence shells.

Hydrogen and helium atoms need only two electrons to fill their valence shells.
Atoms that don't have full valence shells form chemical bonds with other atoms to fill their valence shells and satisfy the octet rule.
Chemical bonds are forces that hold atoms together.
A force is a push or pull on an object.

Hope this helps you!

Have a great day! :)

PolarNik [594]3 years ago

4 0

The Octet rule is a general rule of thumb that applies to most atoms. Basically, it states that every atom wants to have eight valence electrons in its outermost electron shell.

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A gas sample has a temperature of 19 °C with an unknown volume. The

andreev551 [17]

Answer: 373 mL

Explanation:

Since there is no change in pressure, the formula: V / T = V / T can be used.

However, you must first convert the temperatures to Kelvin by adding 273 to them:

(19 + 273) = 292K and (90 + 273) = 363K.

Now, plug in: V / 292 = 464 / 363 → V = 373 mL :)

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2 years ago

Dribbling a basketball harder into the floor makes it bounce higher is an example of what newton's law?

vodomira [7]

Newton’s third law, because a person(a) is acting upon the ball(b) by dribbling the ball on the floor

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2 years ago

Metals react with oxygen to give oxides with the general formula MxOy. What is a balanced chemical equation for the reaction of

katovenus [111]

Answer: $4Fe+3O_2\rightarrow 2Fe_2O_3$

Explanation:

For formation of a neutral ionic compound, the charges on cation and anion must be balanced. The cation is formed by loss of electrons by metals and anions are formed by gain of electrons by non metals.

Here iron is having an oxidation state of +3 called as $Fe^{3+}$ cation and oxide $O^{2-}$ is an anion with oxidation state of -2. Thus they combine and their oxidation states are exchanged and written in simplest whole number ratios to give neutral $Fe_2O_3$ .

According to the law of conservation of mass, mass can neither be created nor be destroyed. Thus the mass of products has to be equal to the mass of reactants. The number of atoms of each element has to be same on reactant and product side. Thus chemical equations are balanced.

$2Fe+3O_2\rightarrow 2Fe_2O_3$

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3 years ago

Read 2 more answers

How many significant figures are in the mass 3.0047 g?

Rudik [331]

Answer:

5 significant figures

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3 years ago

Which notation represents the largest atomic radius?

Darina [25.2K]

Answer:

Calcium(Ca)

Explanation:

Atomic radius is the distance from the nucleus of an atom the outermost energy shell or energy level.
The atomic radii of metals are greater than the ionic radii since metals form ions by losing electrons.
Calcium atom has a larger atomic radius compared to magnesium atom because it has more energy levels. Calcium atoms have four energy levels while magnesium atoms have three energy levels.

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3 years ago