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3 years ago

where are the most reactive elements on the periodic table ? what makes one element more reactive than another

Chemistry

1 answer:

DedPeter [7]3 years ago

7 0

Lower left corner and the upper right corner before the noble gases

Number of valence electrons

Explanation:

The most reactive elements are the most electropositive and electronegative elements.

Francium is the most reactive metal and flourine the most reactive non-metals.

Francium is the most electropositive metal and fluorine is the most electronegative non-metal.

Electropositivity is the ability of an atom to willingly lose its valence electrons. This is typical of metals.

Electronegativity is the ability of atoms to attract the shared electrons to themselves in a bond.

An element is more reactive than another based on the number of valence electrons it has.
The valence electrons determines how reactive an atom is or would be.
Elements that requires just one or two electrons to complete their octet would be highly reactive and dire need to find such electron.
Also, elements with just an electron above the stable configuration will easily want to lose it.
Elements with a complete configuration will not be reactive.

The valence electrons are the electrons in the outer most shell of an atom used in chemical bonding.

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A The Haber process is typically carried out at a temperature of approximately 500∘C. What would happen to the rate of the forwa

Evgen [1.6K]

Answer:

(I) Decrease in temperature from 500oC to 100oC will increase the rate of the forward reaction.

(II) Decreasing the concentration of nitrogen will decrease the reaction rate of the forward reaction.

(III) Increasing the concentration of ammonia will increase the rate of the reverse reaction.

(IV) When a catalyst is added, the rate of the forward reaction increases while that of the reverse reaction decreases.

Explanation:

Chemical equilibrium is a dynamic reversible process where both the forward and reverse reactions occur at the same time and the concentration of all the chemical species in the system remain constant under standard conditions. Equilibrium state is dependent on:

I. Temperature of the reacting system.

II. Concentration of the reacting system.

III. Pressure of the reacting system ( for gases ).

The reaction equation for the Haber process of ammonia production: N2(g) + 3H2(g) <-> 2NH3(g)

According to Le Chatelier's principle that if an external stress or factor is imposed on an equilibrium system, the equilibrium shifts to annul or neutralize the stress:

(I) Decrease in temperature from 500oC to 100oC will increase the rate of the forward reaction because it was originally in the equilibrium state of a higher temperature.

(II) Decreasing the concentration of nitrogen will decrease the reaction rate of the forward reaction by decreasing the formation of ammonia (product).

(III) Increasing the concentration of ammonia will increase the rate of the reverse reaction by preventing its formation from the reactants nitrogen and hydrogen.

(IV) When a catalyst is added, the rate of the forward reaction increases while that of the reverse reaction decreases. This is achieved by the catalyst lowering the activation energy ( the minimum energy required for the reaction to occur ) of the reaction, hence, making it to occur faster.

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3 years ago

What things can the atomic radiation help us with

Triss [41]

Chemotherapy is when radiation is used to kill cancer cells while sparing healthy tissue cells, also doctors sometimes inject patients with a nuclear tracer to show problematic areas that need to be checked out, and Nuclear power plants use nuclear energy to create a large amount of energy from just a small amount of Uranium. These are just some of the ways nuclear radiation is used to help us.

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3 years ago

If oxygen has a molar mass of 16.0 g/mole, carbon has a molar mass of 12.0 g/mole and hydrogen has a molar mass of 1.01 g/mole,

Stolb23 [73]

The number of mole of ethanol present in the beaker is 0.217 mole

Description of mole
The mole of a substance is related to it's mass and molar mass according to the following equation:
Mole = mass / molar mass

How to determine the mole of C₂H₅OH
From the question given above, the following data were obtained:
Mass of C₂H₅OH = 10 g
Molar mass of C₂H₅OH = (12×2) + (1.01×5) + 16 + 1.01 = 46.06 g/mol
Mole of C₂H₅OH =?

Mole = mass / molar mass
Mole of C₂H₅OH = 10 / 46.06
Mole of C₂H₅OH = 0.217 mole

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2 years ago

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Ede4ka [16]

Answer:

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2 years ago

How many grams of aluminum are required to react with 35 mL of 2.0 M hydrochloric acid, HCl?__ HCl + __ Al --> __ AlCl3 + __

kiruha [24]

Answer:

0.6258 g

Explanation:

To determine the number grams of aluminum in the above reaction;

determine the number of moles of HCl
determine the mole ratio,
use the mole ratio to calculate the number of moles of aluminum.
use RFM of Aluminum to determine the grams required.

Moles of HCl

35 mL of 2.0 M HCl

2 moles of HCl is contained in 1000 mL

x moles of HCl is contained in 35 mL

$x \: mol \: = \: \frac{2 \: \times \: 35}{1000} \\ = 0.07 \: moles \:$

We have 0.07 moles of HCl.

Mole ratio

Balanced equation

6HCl(aq) + 2Al(s) --> 2AlCl3(aq) + 3H2(g)

Hence mole ratio = 6 : 2 (HCl : Al

but moles of HCl is 0.07, therefore the moles of Al;

$= \frac{2}{6} \times 0.07 \\ \: = 0.0233333 \: moles$

Therefore we have 0.0233333 moles of aluminum.

Grams of Aluminum

We use the formula;

$grams \: = moles \: \times \: rfm$

The RFM (Relative formula mass) of aluminum is 26.982g/mol.

Substitute values into the formula;

$= 0.0233333 \: moles \: \times \: 26.982 \: \frac{g}{mol} \\ = 0.625799 \: grams$

The number of grams of aluminum required to react with HCl is 0.6258 g.

3 0

2 years ago

where are the most reactive elements on the periodic table ? what makes one element more reactive than another​

where are the most reactive elements on the periodic table ? what makes one element more reactive than another