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3 years ago

6

Hydrogen's sole electron occupies the 1s orbital but can be excited to the 4p orbital. List all the orbitals this electron might

occupy on its way back to its ground state.

1 answer:

vesna_86 [32]3 years ago

8 0

4p, 3d, 3p, 3s, 2p, 2s and 1s orbitals may be occupied during de-excitation.<span />

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Elements found in group 1A on the periodic table display which properties?

hram777 [196]

Elements found in group 1A on the periodic table display Alkali metals. Alkali Metals is your answer.

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A certain element consists of two stable isotopes. The first has atomic mass of 7.02 amu and a percent natural abundance of 92.6

statuscvo [17]

<u>Answer:</u> The average atomic mass of the element is 6.95 amu

<u>Explanation:</u>

Average atomic mass of an element is defined as the sum of masses of each isotope each multiplied by their natural fractional abundance.

Formula used to calculate average atomic mass follows:

$\text{Average atomic mass }=\sum_{i=1}^n\text{(Atomic mass of an isotopes)}_i\times \text{(Fractional abundance})_i$ .....(1)

We are given:

Mass of isotope 1 = 7.02 amu

Percentage abundance of isotope 1 = 92.6 %

Fractional abundance of isotope 1 = 0.926

Mass of isotope 2 = 6.02 amu

Percentage abundance of isotope 2 = 7.42 %

Fractional abundance of isotope 2 = 0.0742

Putting values in equation 1, we get:

$\text{Average atomic mass of element}=[(7.02\times 0.926)+(6.02\times 0.0742)]$

$\text{Average atomic mass of element}=6.95amu$

Hence, the average atomic mass of the element is 6.95 amu

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2 years ago

How are two atoms of the same element alike?

AnnyKZ [126]

Answer:

Explanation:

The nucleus of an atom contains neutrons and protons bonded tightly together. The same chemical element can have a different number of neutrons and still be the same element.

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Energy flows from colder objects to warmer objects. is it true or false?

mixas84 [53]

Answer:

true. j

Explanation:

I think its true

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I believe that the answer to the question provided above is that the <span>substance helps suspend fat in a watery digestive mixture, making fat more available to digestive enzymes is known as starch.</span>
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