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
arsen [322]
3 years ago
7

How to find the number of proton and neutron

Chemistry
1 answer:
VladimirAG [237]3 years ago
7 0

go to periodic table


look for the element you want


find the atomic number on the top right hand side of the element

atomic number = equal to number of proton.


find atomic mass bottom right hand side of the element


atomic mass - atomic number = neutron


i hope this will help

Na atomic number 11 and mass number 23

protons 11

neutron =23-11=12

You might be interested in
Which pH indicates a substance that is more acidic than a substance with a pH of 4
dexar [7]
Anything with a pH level of 3, 2, or 1.
8 0
3 years ago
Morgan and Lily are studying the density of substances. After determining a block's mass and volume, they determine its density
slavikrds [6]
The formula of Density is known as:

Density = mass/volume

Units: g/cm^3

Hope this helps!
3 0
3 years ago
The isomerization reaction, ch3nc → ch3cn, is first order and the rate constant is equal to 0.46 s-1 at 600 k. what is the conce
Harlamova29_29 [7]
According to this formula :
㏑[A] /[Ao] = - Kt 
when we have Ao = 0.3 m 
and K =0.46 s^-1
t = 20min = 0.2 x 60 =12 s
So by substitution :
㏑[A] / 0.3 = - 0.46 * 12
㏑[A] / 0.3 = - 5.52
by taking e^x for both side of the equation we can get [A]
∴[A] = 0.0012 mol dm^-3
6 0
3 years ago
In an aqueous solution at 25°C, if [H30+] = 3.3 * 10^4 M, then [OH-] is:
sleet_krkn [62]

Answer:

[OH-] = 3.0 x 10^-19 M

Explanation:

[H3O+][OH-] = Kw

Kw = 1.0 x 10^-14

[H3O+][OH-] = 1.0 x 10^-14

[OH-] = 1.0 x 10^-14 / 3.3 x 10^4 = 3.0 x 10^-19

3 0
3 years ago
Use the molar heat capacity for aluminum from table 1 to calculate the amount of energy needed to raise the temperature of 260.5
Nimfa-mama [501]
Unfortunately, you failed to include the table 1 from which the molar heat capacity of aluminum could have been obtained. However, as a general rule, the heat needed to raise the temperature of a certain substance by certain degrees is calculated through the equation,
                            H = mcpdT
where H is heat, m is mass, cp is specific heat capacity, and dT is change in temperature. From a reliable source, cp for aluminum is equal to 0.215 cal/g°C. Substituting this to the equation,
                               H = (260.5 g)(0.215 cal/g°C)(125°C - 0)
                                        H = 7000.94 cal
6 0
3 years ago
Other questions:
  • A particular brand of gasoline has a density of 0.737 g/mL at 25 ∘C. How many grams of this gasoline would fill a 15.7 gal tank
    13·1 answer
  • Which is a characteristic of a mixture?
    12·1 answer
  • A sample of pure NH4HS is placed in a sealed 2.0-L container and heated to 550 K at which the equilibrium constant is 3.5 x 10-3
    15·1 answer
  • If a piece of aluminum with a mass of 3.99 g and a temperature of 100.0 °C is dropped
    13·1 answer
  • 1. Write formulas for the binary ionic compounds formed between
    9·2 answers
  • Write a balanced chemical equation for the reaction of aqueous solutions of lead(II) nitrate and potassium iodide
    13·1 answer
  • PLEASE NO LINKS OR FILE SCAMS
    5·1 answer
  • Which of the following sets of quantum numbers refers to a 4p orbital
    8·1 answer
  • How many protons, neutrons, and electrons are there in a neutral atom of 60 Co (cobalt- 60 )?
    14·1 answer
  • What can be said about an exothermic reaction with a negative entropy change?.
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!