If the states of matter have changed such as from solid to liquid, you have to remove or add energy.
The result of Moseley's revisions were that the elements were arranged in atomic number order rather than atomic mass order.
Answer:
History is the study of the past in all its forms. Philosophy of history examines the theoretical foundations of the practice, application, and social consequences of history and historiography. It is similar to other area studies – such as philosophy of science or philosophy of religion – in two respects.
Explanation:
Answer:
1 electron
Explanation:
Look at the periodic table
Li is the 3rd element
now write the electron configuration -> 1s^2 2s^1
the 2nd electron shell has 1 electron as shown above so its 1 electron
