1. Potential Energy is stored energy a object has when it's not moving.
2. Potential Energy is it's highest on the first stage because as you see the roller coaster is bout to go down the tract which is going to higher the kinetic energy and lower the potential energy.
3. Kinetic Energy is the amount of energy a object has when it's in motion or moving.
4. Kinetic Energy is it's highest in the third stage after it's gone down the tract and potential energy fully decreased and it's at zero.
Remember that potential energy is stored energy so when a object is not moving in this case the roller coaster isn't moving on the first stage when its bout to go down the roller coaster. Kinetic energy is the amount of energy a object has when it's in motion so in this case the third stage would have the highest example of Kinetic energy because it's fully in motion and has no potential energy.
Explanation:
Tc - 99 is technetium 99.
It is a radioactive element that decays spontaneously. It has a half-life of 211,000 years and decays to stable ruthenium.
- On the periodic table, it has an atomic number of 43;
Mass number = 99
Atomic number = number of protons = number of electrons in atom
Number of protons in Tc is 43
electron is 43
Mass number = number of protons + number of neutrons
Number of neutrons = mass number - number of protons = 99-43 = 56
learn more:
Atomic number brainly.com/question/2057656
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Answer is: electronegativity decreases with increase of atomic radius, because of increased distance between the valence electrons and nucleus, so atoms tends to lose electrons easier.
Electronegativity<span> is a chemical property that describes the
tendency of an atom to attract
a shared pair of electrons towards
itself.</span>
The atomic radius of
a chemical element is a measure of the size of its atom.The atomic radius
varies with increasing atomic number, but usually increases because of
increasing of number of electrons.The atomic radius decreases across the
periods because an increasing number of protons, because greater attraction
between the protons and electrons.
Answer: 1) The nuclide formed from the alpha decay of 
is 
2) The nuclide formed from the beta-minus decay of is 
Explanation:
1) For alpha-decay
In this process, alpha particle is released.
Equation follows:
The nuclide formed is
2) For beta-minus decay
In this process, a neutron is converted into a proton and an electron.
Equation follows:
The nuclide formed is
Answer:
It’s the 3 one
Explanation:
Also I think it’s suppose to be
a
b
c
d
