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3 years ago

Which element has exactly ﬁve electrons in the highest principal energy level (the outer shell)?

Chemistry

2 answers:

aleksley [76]3 years ago

8 0

Phosphorus (P) has 5 valence electrons in its outer shell, meaning, it needs 3 more to become a stable element.

statuscvo [17]3 years ago

7 0

This question is asking for an element with 5 valence electrons. Just go to the row it is in (excluding transition metals) and count over.
The answer would be c. P

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How did the different reform movements we've discussed change and shape America? Pls help

tigry1 [53]

Answer:

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3 years ago

What is the Definition of "Folded Mountain" in science terms?

just olya [345]

Fold mountains are mountains that form mainly by the effects of folding on layers within the upper part of the Earth's crust. Before either plate tectonic theory developed, or the internal architecture of thrust belts became well understood, the term was used for mostmountain belts, such as the Himalayas.

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3 years ago

NISA [10]

Answer:

C. involve the attraction of opposite charges

Explanation:

Ionic bonding involves the attraction between oppositely charged ions, as in Na⁺ Cl⁻.

Covalent bonding involves the attraction between negatively charged electrons and positivey charged nuclei, as in a C-H bond.

A is wrong. Ionic bonding involves the transfer of electrons.

B is wrong. Covalent bonding involves the sharing of electrons.

D is wrong. Ionic bonds are usually stronger than covalent bonds.

5 0

3 years ago

Write 10,847,100 in Scientific Notation with 4 significant figures.

masha68 [24]

Answer:

The number 10,847,100 in Scientific Notation is $1.0847x10^{7}$

Explanation:

Scientific notation is an easy form to write long numbers and it is commonly used in the scientific field. To write a long number in a shorter way it is necessary to 'move' the decimal point to the left the number of positions that are necessary until you get a unit. Then you write the number and multiplied it by 10 raised to the number of positions you moved the decimal point. In this case, it is necessary to move the decimal point 7 positions so, we multiply the number by 10 raised to 7.

5 0

3 years ago

How many moles of carbon are in 7.00 x 1023 atoms of carbon?

Andru [333]

Answer:

<h2>1.16 moles</h2>

Explanation:

To find the number of moles in a substance given it's number of entities we use the formula

$n = \frac{N}{L} \\$

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities

From the question we have

$n = \frac{7 \times {10}^{23} }{6.02 \times {10}^{23} } = \frac{7}{6.02} \\ = 1.162790....$

We have the final answer as

<h3>1.16 moles</h3>

Hope this helps you

8 0

3 years ago