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
Ann [662]
3 years ago
13

In atomic science, the z number refers to the number of __________ in the nucleus of an atom.

Chemistry
1 answer:
Sliva [168]3 years ago
6 0
By convention, the symbol Z is assigned to the number of protons in the nucleus, or simply, the atomic number of an element. This is actually used when you want to determine the effective nuclear charge of a specific electron of an element. The equation is:

Z* = Z - S
where
Z* is the effective nuclear charge
Z is the atomic number
S is the number of electrons between the electron in question and the nucleus

There is due to a phenomenon called the shielding effect. This effect states that the farther the electron is from the nucleus, the lesser is its pull of force to the nucleus. That is the reason why the valence electrons (outermost electrons) are the ones always involved in chemicals reactions. Because they are not that strongly bonded to the nucleus of an atom.
You might be interested in
How many atoms are in 68.44 grams
creativ13 [48]
Correct answer There are 68 grams are in atoms
3 0
3 years ago
What is the concentration of a solution with a volume of 2.5 liters containing 600 grams of calcium phosphate?​
trapecia [35]

Answer:

1.12M

Explanation:

Given parameters:

Volume of solution  = 2.5L

Mass of Calcium phosphate  = 600g

Unknown:

Concentration  = ?

Solution:

Concentration is the number of moles of solute in a particular solution.

Now, we find the number of moles of the calcium phosphate from the given mass;

        Formula of calcium phosphate  = Ca₃PO₄

         molar mass = 3(40) + 31 + 4(16) = 215g/mol  

Number of moles of  Ca₃PO₄  = \frac{600}{215}   = 2.79moles

   Now;

  Concentration  = \frac{Number of moles }{volume }  

 Concentration  = \frac{2.79}{2.5}   = 1.12M

7 0
3 years ago
An electrochemical cell has the following overall reaction.
elena-s [515]
Its 4 dude i did this already
8 0
2 years ago
Read 2 more answers
When electrolyzing copper (ll) chloride, what reaction takes place at the anode? What reaction takes place at the cathode?
klemol [59]

Answer:

Copper ions are reduced into copper atoms.

Cu²⁺₍aq₎ + 2e⁻ →  Cu₍s₎

Explanation:

During electrolysis,  the positive H⁺ and Cu⁺ ions move to the negative cathode and negative OH⁻ and Cl⁻ ions move to the positive anode.

At cathode, copper ions are preferentially discharged due to the low electromotive force required to discharge them compared to the hydrogen ion. The copper ions gain the two electrons lost by the chloride ions when the are discharged. (2 Cl⁻₍aq₎ → Cl₂₍g₎ + 2e⁻)

Thus the half equation is as follows:

Cu²⁺₍aq₎ + 2e⁻ →  Cu₍s₎

5 0
3 years ago
Which of the following is the correct definition for electronegativity?
yuradex [85]

Answer:

\color{Blue}\huge\boxed{Question}

<h3>Which of the following is the correct definition for electronegativity</h3>

\color{Blue}\huge\boxed{Answer}

<h3>А. The amount of energy to attract or bond electrons</h3>
6 0
3 years ago
Other questions:
  • What is the maximum theoretical efficiency possible for a heat engine operating between a reservoir in which ice and water coexi
    5·1 answer
  • The sodium chloride molecule breaks apart in water. what does a represent
    13·1 answer
  • The solid compound, K2SO4, contains?
    5·1 answer
  • In the following diagram the counter clockwise torque is?
    6·1 answer
  • Aluminum has a density of 2.70 g/cm^3. How Many moles of aluminum are in a 13.2 cm^3 block of the metal substance? Fill in the t
    6·1 answer
  • PLEASE HURRY! What is the name of this alkane?
    9·1 answer
  • 10 points. Please help.
    6·1 answer
  • Helppppppp. much needed help lol
    14·2 answers
  • 4. Which statement correctly explains why hydrogen fluoride dissolves in water?
    10·1 answer
  • I NEED HELP ASAP!!!!<br><br><br><br> ITS DUE IN A FEW MINUTES!!!!
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!