1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
garik1379 [7]
2 years ago
13

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

Chemistry
2 answers:
wlad13 [49]2 years 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]2 years ago
5 0

Answer:

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

You might be interested in
In a chemical reaction, which are the most likely products of these reactants 4Fe+302
Cerrena [4.2K]

2Fe2O3, reason is when we add 4Fe + 3O2, we get the same answer, but in a different form.

8 0
3 years ago
Which came first the henry g.j moseley atomic model or the niels bohr atomic model?
Gnesinka [82]
The niels bohr model
5 0
3 years ago
No one believed him b/c he had no
Rainbow [258]

Answer:

Chicken nuggets

hope it helps have a nice day

6 0
2 years ago
Read 2 more answers
What is the pH of a 0.640 M solution of C₅H₅NHBr (Kb of C₅H₅N is 1.7 × 10⁻⁹)?
Elden [556K]

The pH of a 0.64 M solution of pyridine (C₅H₅N) is 9.52.  

<h3>What is pH ?</h3>

A figure expressing the acidity or alkalinity of a solution on a logarithmic scale on which 7 is neutral, lower values are more acid and higher values more alkaline.

The equation for the protonation of the base pyridine is the following:

C₅H₅N + H₂O ⇄ C₅H₅NH⁺ + OH⁻   (1)

Kb = 1.7 × 10⁻⁹ (Given)

To calculate the pH of the solution we need to use the following equation:

pH + pOH = 14

<em>pH = 14 - pOH</em>

     =14 - [-log[OH⁻]]

    = 14 + log[OH⁻]

Now, we need to find the concentration of the OH⁻ ions. Since pyridine is a weak base, at the equilibrium we have (eq 1):

C₅H₅N  +  H₂O  ⇄  C₅H₅NH⁺  +  OH⁻

0.64 - x                          x              x

After entering the values of [C₅H₅N] = 0.64-x, [C₅H₅NH⁺] = x, and [OH⁻] = x, into equation (2) we can find the concentration of OH⁻:

1.7 × 10⁻⁹  =[C₅H₅NH⁺]  [OH⁻]  /  [C₅H₅N]

                = x . x / 0.64-x

1.7 × 10⁻⁹ (0.64-x) - x² = 0

Solving the above quadratic equation for x, we have :

  • x₁ = -3.32 x 10⁻⁵
  • x₂ = 3.32 x 10⁻⁵

Now, We can calculate the pH, after taking the positive value, x₂, (concentrations cannot be negative) and entering into above equation :

<em />

<em>pH = </em>14 + log[OH⁻]

     = 14 + log (3.32 x 10⁻⁵)

 

     = 9.52

Therefore, the pH of the solution of pyridine is 9.52.

Find more about pH here:

brainly.com/question/8834103?referrer=searchResults

#SPJ1

3 0
2 years ago
How to answer all these questions?
Fudgin [204]
You have to do it to see the results
8 0
3 years ago
Other questions:
  • Which acceleration will a 20 Newton force cause if applied to a go kart with a 20 kilogram mass? 1 m/s, 20m/s, 10 m/s, 2 m/s
    9·1 answer
  • What is one way to test whether an unknown solution is acidic or basic
    12·1 answer
  • Consider a different analyte for this exercise. Citric acid is found in many fruits and fruit juices. Sodium hydroxide (NaOH) is
    8·1 answer
  • How many moles of no2 are equivalent to 74.3g of no2
    14·2 answers
  • Can someone pls answer quickly?
    13·2 answers
  • Calculate the molar concentration of 4.75 moles of NaCl in<br> 0.50 liters of water?
    10·1 answer
  • HIGH POINTS BRAINLIEST!! HURRY
    6·1 answer
  • Pls help 25 pts
    8·1 answer
  • How many moles of magnesium are in 3. 01 x 10^22 atoms of magnesium.
    15·1 answer
  • At constant P and n, T decreases at V is?
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!