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garik1379 [7]
1 year ago
13

Why does atomic radii decrease as you move from the left to right across the period

Chemistry
2 answers:
wlad13 [49]1 year ago
6 0

When we move from left to right across the periodic table, we can see that the atomic radii keeps decreasing. This is because, as you move from left to right, the nucleus gains protons. The atomic number increases and hence the valence electron will feel more attracted towards the nucleus & the atomic radii will decrease.

\mathbb{MIREU}

artcher [175]1 year ago
5 0

Answer:

This is because, within a period or family of elements, all electrons are added to the same shell.

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An atom of fluorine has an atomic mass of 19 u. Keeping in mind that its atomic number is 9, what can you infer about this atom?
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3 years ago
Suppose 0.981 g of iron (II) iodide is dissolved in 150. mL of a 35.0 m M aqueous solution of silver nitrate. Calculate the fina
yaroslaw [1]

Answer:

Final molarity of iodide ion C(I-) = 0.0143M

Explanation:

n = (m(FeI(2)))/(M(FeI(2))

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So n = 0.981/309.85 = 0.0031 mol

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n(AgNO3) = C(AgNO3) x V(solution)

= 0.035 x 0.15 = 0.00525 mol

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So, n(FeI(3)) excess = 0.00525 - 0.0031 = 0.00215mol

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8 0
3 years ago
In the activated complex for a chemical reaction, what bonds are broken and what bonds are formed?
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8 0
2 years ago
If you have 5.42 x 1024 aluminum atoms, approximately how many moles is that
sattari [20]

Answer:

<h2>9.00 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{5.42 \times  {10}^{24} }{6.02 \times {10}^{23} }  \\  = 9.0033

We have the final answer as

<h3>9.00 moles</h3>

Hope this helps you

4 0
2 years ago
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