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Alexus [3.1K]
3 years ago
11

this element is the only element that is shiny, mallable, and a good conductor of heat and electricity. it has a higher number a

tomic number than cesium but lower than radon​
Chemistry
1 answer:
Ainat [17]3 years ago
3 0
I do not have my reference table out to see the periodic table but in order to achieve the answer pull out the periodic table. You now know that this element is going to be a metal because it is a good conductor of electric and is malleable. Next you will find both cesium and radon and look in between them to see which one is a metal that has an atomic number that lies between both radon and cesium
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How many elements and how many atoms are in MgCI2
aliina [53]

Answer: two elements and three atoms

Explanation:

An element is the simplest substance and hence cannot be broken down using chemical reactions.

Magnesium chloride (MgCl_2) is an ionic compound formed by the transfer of electrons from element magnesium (Mg) to element chlorine (Cl) where Magmesium forms a cation Mg^{2+} by losing two electrons and chlorine forms an anion Cl^{-} by gaining electron.

There are 3 atoms in Magnesium chloride (MgCl_2) which include one atom of magnesium (Mg) and two atoms of chlorine (Cl).

5 0
3 years ago
What is the energy required to remove the electron from a hydrogen atom in the n = 11 state?
zaharov [31]

Based on the data given, the energy required to remove an electron from a hydrogen atom in the n = 11 state is -0.112 eV

<h3>What is ionization energy?</h3>

Ionization energy is the energy requiredto remove an electron from a neutral atom or a cation in its gaseous state.

To calculate the energy required to remove the electron from a hydrogen atom in the n = 11 state, the formula below is used:

  • E_n = \frac{E_0 × Z^{2}}{n^{2}}

where

E_0  \: is  \: ground  \: state  \: energy  \: of \:  hydrogen \:  atom \:  = -13.6 eV \\

  • Z = 1
  • n = 11

substituting the values:

E_n = \frac{ - 13.6 × 1^{2}}{11^{2}} \:  =  - 0.112 \: eV

Therefore, the energy required to remove an electron from a hydrogen atom in the n = 11 state is -0.112 eV

Learn more about ionization energy at: brainly.com/question/1445179

5 0
2 years ago
Can i titrate a solution of unknown concentration with another solution of unknown concentration and still get a meaningful answ
olga2289 [7]

Answer:

No, I don't think so at least

Explanation:

In chemistry, you do calculations to find the concentration of a solution with another solution of KNOWN concentration. Without concentrations of either solution, were would you get values from? Where would you start? :3

6 0
3 years ago
The following reaction has Kp = 109 at 25°C. 2 NO(g) + Br2(g) equilibrium reaction arrow 2 NOBr(g) If the equilibrium partial pr
kati45 [8]

<u>Answer:</u> The equilibrium partial pressure of NO is 0.0034 atm

<u>Explanation:</u>

For the given chemical equation:

NO(g)+Br_2(g)\rightleftharpoons 2NOBr(g)

The expression of K_p for above equation follows:

K_p=\frac{(p_{NOBr})^2}{p_{NO}\times p_{Br_2}}

We are given:

Equilibrium partial pressure of Br_2 = 0.0159 atm

Equilibrium partial pressure of NOBr = 0.0768 atm

K_p=109

Putting values in above equation, we get:

109=\frac{(0.0768)^2}{p_{NO}\times 0.0159}\\\\p_{NO}=0.0034atm

Hence, the equilibrium partial pressure of NO is 0.0034 atm

3 0
3 years ago
Which transition could represent an atom that emits a photon with 10.2 eVeV of energy?
AlekseyPX
There is a co2 contotution
7 0
2 years ago
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