How can you tell if an element is a solid,liquid,gas or synthetic
1 answer:
It all depends on how high or low an objects melting point is. and solid, liquid, and gases are states of matter, you have to play with the temperatures of objects.
But most of the elements on the periodic table are solid at room temperature except gases hydrogen, nitrogen, oxygen, fluorine and chlorine, the “noble” gases helium, neon, argon, xenon, krypton and radon, and the liquids bromine and mercury. The only liquid elements at standard temperature and pressure are bromine (Br) and mercury (Hg). Although, elements cesium (Cs), rubidium (Rb), Francium (Fr) and Gallium (Ga) become liquid at or just above room temperature.
The mostly red pic are the solids, the pic with only two highlighted squared are liquids, the pic with the row of squares are the gases, and the last pic (with dark background) are the synthetic elements
Hope this helps.
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Explanation:
It is known that each metal has a different work function and it is just the energy required to remove the electron from the surface.
The relation between energy and work function is as follows.
where, = energy of photon
Q = work function
K.E = kinetic energy of electron
When the value of Q is large then the amount of energy required by the photon is also large and vice-versa.
And, when there is not sufficient energy to remove an electron from metal surface or energy is less than its work function then electron will not be removed.
On the other hand, when incoming photon will have enough energy then electron will be ejected.
In the given situation, light from laser A is not able to remove the electron from metal surface which means that energy of photon is less than work function Q.
As, both B and C are able to remove electron from the surface of metal. So, after the removal of electrons rest of the energy of photons is transferred to eject electrons and this energy is converted into kinetic energy.
As energy of B is greater than the energy of C and A has the lowest energy among all.
Therefore, order of energy from lowest to highest is as follows.
A < C < B
Now, the relation between energy and wavelength is as follows.
E =
where, = wavelength
So, energy is inversely proportional to wavelength. Therefore, increase in energy means decrease in wavelength.
Therefore, increasing order of wavelength is as follows.
B < C < A
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