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3 years ago

Write the electron configuration for O^2- ion

Chemistry

2 answers:

RideAnS [48]3 years ago

5 0

Answer:

<h2>What is electron configuration?</h2>

The arrangement of electrons in an atom, molecule, or other physical structure like a crystal. Electron configuration describes the distribution of electrons among different orbitals (including shells and subshells) within atoms and molecules.

jarptica [38.1K]3 years ago

4 0

Answer:

$1 {s}^{2} 2 {s}^{2} 2 {p}^{2}$

Explanation:

The solution is in the image

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Element X had a mass of 300g and a 1/2 life of 10 years. how many grams will remain after 40 years?

kiruha [24]

<h3>Answer:</h3>

18.75 grams

<h3>Explanation:</h3>

Half-life refers to the time taken by a radioactive material to decay by half of the original mass.
In this case, the half-life of element X is 10 years, which means it takes 10 years for a given mass of the element to decay by half of its original mass.
To calculate the amount that remained after decay we use;

Remaining mass = Original mass × (1/2)^n, where n is the number of half-lives

Number of half-lives = Time for the decay ÷ Half-life

= 40 years ÷ 10 years

= 4

Therefore;

Remaining mass = 300 g × (1/2)⁴

= 300 g × 1/16

= 18.75 g

Hence, a mass of 300 g of an element X decays to 18.75 g after 40 years.

3 0

4 years ago

Consider this equilibrium:

Ilia_Sergeevich [38]

Answer:

the answer is option E they are bronsted lowry acid

7 0

3 years ago

Describe what golgi looks like.

Margaret [11]

Here is what Golgi looks like, so that you can look at the picture and describe it.
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Glad I could help, and good luck!
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7 0

3 years ago

Mn2(CO3)3 what is the cation and anion in this compound?

brilliants [131]

Mn+2 is cation and CO3 is anion
hope it help

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3 years ago

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True/False Indicate whether the sentence or statement is true or false. The number 1 234 000 in scientific notation is equal to

Shalnov [3]

False bc 1.234 x 10^5 is 123400

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3 years ago