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
AnnZ [28]
3 years ago
6

How many neutrona do Po 211 and Po 215 have?​

Chemistry
1 answer:
Fed [463]3 years ago
3 0

127 and 138

Explanation:

    Atomic representation:

               ²¹¹₈₄Po                     ²¹⁵₈₄Po

An atom is made up of protons, neutrons and electrons:

   The number of protons and neutrons makes up the mass number of an atom

The number of protons are the atomic number

     ²¹¹₈₄Po    

 211 is the mass number of polonium

  84 is the atomic number:

     Number of neutrons = Mass number - atomic number(number of protons)

    Number of neutrons = 211 - 84 = 127

For   ²¹⁵₈₄Po

  Number of neutrons = 215 - 84 = 138

Learn more:

Neutrons brainly.com/question/6837201

#learnwithBrainly

You might be interested in
Which equation will you use to calculate the volume of a 5.00 liter sample of air at 50°C when it is warmed to 100°C at constant
Alexandra [31]
I believe it's a proportion of volume over temperature = volume and temperature. cross multiply and divide and see what u get. if it looks right go fro it if not try something else. I hope this helps!
6 0
3 years ago
Read 2 more answers
How is an electron orbital similar to a parabola?
AVprozaik [17]

Answer:

Explained below.

Explanation:

First of all, the orbital path of electron is mostly parabolic in electric field.

In an electric field, electrons behave very similar to a projectile. Thus, Electrons have a parabolic path in an electric field simply because the speed of the electrons in a direction which is perpendicular to the electric field is constant since there is no force. Therefore, there will be no acceleration along that perpendicular direction. However there will be an acceleration that is constant in the direction of the electric field which makes it act in a similar manner to a projectile under gravity.

5 0
3 years ago
2. The change in internal energy for the expansion of a gas sample is -4750 J. How much work is done if the gas sample loses 112
Radda [10]

Answer:

The work done by the gas expansion is 5875 J,

Since the work done is positive, the work is done by the gas on the surroundings.

Explanation:

Given;

change in internal energy, ΔU = -4750 J

heat transferred to the system, Q = 1125 J

The change in internal energy is given by;

ΔU = Q - W

Where;

W is the work done by the system

The work done by the system is calculated as;

W = Q - ΔU

W =  1125 - (-4750)

W = 1125 + 4750

W = 5875 J

Since the work done is positive, the work is done by the gas on the surroundings (energy flows from the gas to the surroundings).

Therefore, the work done by the gas expansion is 5875 J

7 0
3 years ago
Compounds often have different properties from those of the...
vesna_86 [32]

Compounds often differ from elements.

3 0
3 years ago
Which ion formation takes more energy: K+ or Li+?
Dima020 [189]

Answer:

Li⁺

Explanation:

In ion formation, the ionization energy plays a very important role. To form an ion, an atom will lose or gain an electron to become charged.

The higher the ionization energy of an atom, the more the energy required to remove an electron from it to form an ion.

  • Ionization energy is the energy required to remove an electron from an atom.
  • It is the readiness of an atom to lose an electron. The lower the value, the easier it is for an atom to lose an electron and vice versa.

Generally, down the group, ionization energy decreases. Since both potassium and lithium are in group 1, Li will have a higher ionization energy. It will take more energy to form Li⁺ compared to K⁺.

3 0
3 years ago
Other questions:
  • How does Earth's rotation axis cause seasons to change?
    6·1 answer
  • Under certain conditions, neon (Ne) gas diffuses at a rate of 4.5 centimeters per second. Under the same conditions, an unknown
    14·2 answers
  • Katie blows up a balloon and ties it so there is a fixed amount of air in the balloon. She wraps a piece of string around the wi
    15·1 answer
  • The Earth's crust is a thin layer that takes up less than<br> %(percent) of the Earth
    5·2 answers
  • Lithium nitride reacts with water to produce ammonia and lithium hydroxide according to the equation, Li3N(s) + 3H2O (L) --&gt;
    11·1 answer
  • Which group of elements will readily lose one electron to meet the octet rule? Alkaline Earth Metals c. Halogens Alkali Metals d
    7·1 answer
  • If a liquid sample of naphthalene is heated and remains at 218 degrees c until it is completely vaporized, you know that 218 deg
    8·2 answers
  • This planet has water in liquid, gas, and solid forms.
    7·2 answers
  • 1. MgCO,→ MgO +Co, is an example of a
    11·1 answer
  • How to find weight with volume and density ​
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!