Answer:
when an electron jumped into higher energy level from lower energy level it must absorbed the energy because with small amount of energy it can not jumped into higher energy level.
when it came back to lower energy level it release extra energy.
Explanation:
The electron is jumped into higher level and back into lower level by absorbing and releasing the energy.
The process is called excitation and de-excitation.
Excitation:
When the energy is provided to the atom the electrons by absorbing the energy jump to the higher energy levels. This process is called excitation. The amount of energy absorbed by the electron is exactly equal to the energy difference of orbits. For example if electron jumped from K to L it must absorbed the energy which is equal the energy difference of these two level. The excited electron thus move back to lower energy level which is K by releasing the energy because electron can not stay longer in higher energy level and comes to ground state.
De-excitation:
When the excited electron fall back to the lower energy levels the energy is released in the form of radiations. this energy is exactly equal to the energy difference between the orbits. The characteristics bright colors are due to the these emitted radiations. These emitted radiations can be seen if they are fall in the visible region of spectrum
.
Answer:
protons in the atom.
Explanation:
The identity of an element relies on the number of protons in its atom. This is called the atomic number. The atomic number is the basis of the periodic table of elements. Modern periodic law states that "the properties of elements are a periodic function of their atomic number".
Atomic number of atoms do not change and they are convieniently used in identifying an atom.
Melting, boiling, and evaporation, in general, are endothermic processes.
Answer:
A. TRUE
Explanation:
A comprehensive incident response system helps ensure the integration of response efforts. It is a standardized approach to incident management, in place, which covers all hazards. It allows all respondents to adopt an integrated organizational structure that fits the complexities and demands of the incident while respecting the authorities of the agencies and the jurisdiction. Although standardization is promoted, it does not do so without the necessary flexibility. For example, the organizational structure can be expanded or contracted to meet the needs of the incident.
