All categories

2 years ago

A neutral atom in the ground state has four electrons in its fifth and outermost principal energy level. What element is it?

Chemistry

1 answer:

Zepler [3.9K]2 years ago

7 0

Answer:

Tin

Explanation:

Tin is an element which belongs to the carbon family in the periodic table. It lies in group 14 of the periodic table i.e. IV a.

The symbol of Tin is Sn. Tin has 50 electron in total. Its atomic number is 50. The 50 electrons of tin are divided in its five energy shells. The outer most or the valence shell contains 4 electrons in the ground state.

The number of electrons present per shell in tin is : 2, 8, 18, 18, 4.

The electronic configuration of tin is : [Kr] 4d¹⁰5s²5p²

You might be interested in

Someone pls help me I will make you brain

Gnesinka [82]

Answer:

The answer is steam of fossil fuels

8 0

2 years ago

How fast must a 56.5-g tennis ball travel in order to have a de Broglie wavelength that is equal to that of a photon of green li

nikklg [1K]

Answer:vv

$v=2.17\times 10^{-26}\ m/s$

Explanation:

The expression for the deBroglie wavelength is:

$\lambda=\frac {h}{m\times v}$

Where,

$\lambda$ is the deBroglie wavelength

h is Plank's constant having value $6.626\times 10^{-34}\ Js$

m is the mass of = $56.5\ g=0.0565\ kg$

v is the speed.

Wavelength = 5400 Å = $5400\times 10^{-10}\ m$

Applying in the equation as:-

$5400\times 10^{-10}=\frac{6.626\times 10^{-34}}{0.0565\times v}$

$v=\frac{331300000}{10^{34}\times \:1.5255}\ m/s$

$v=2.17\times 10^{-26}\ m/s$

7 0

3 years ago

A solution with a molarity of 0.1850 contains 19.30 grams of BaCl2. What is the volume of the solution

svetlana [45]

Answer:

Volume in L = 0.50 L

Explanation:

Given data:

Molarity of solution = 0.1850 M

Mass of BaCl₂ = 19.30 g

Volume of solution = ?

Solution:

First of all we will calculate the number of moles of solute:

Number of moles = mass/molar mass

Molar mass of BaCl₂ = 208.23 g/mol

Number of moles = 19.30 g / 208.23 g/mol

Number of moles = 0.093 mol

Volume of solution:

Molarity = number of moles of solute / volume of solution in L

0.1850 M = 0.093 mol / Volume in L

Volume in L = 0.093 mol / 0.1850 M (M= mol/L)

Volume in L = 0.50 L

4 0

2 years ago

Pls Answer ASAP!!! Need to turn in in 5mins!!!

Citrus2011 [14]

Answer:

Sulfur

Explanation:

I'm sorry I was too late!

If there is an excess of a substance in a reaction, then there is more than enough to complete the reaction. This means that, because we have a specific amount of sulfur, it has to be the limiting reagent.

4 0

2 years ago

Extrusive Igneous rock has ___________ grain size.

zaharov [31]

What sizes are aloud

6 0

2 years ago