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when energy is added to an electron in the lowest energy state (the ground state) and it jumps to a vacant orbital of slightly higher energy in the atom
a solution containing much acid dissolved in little water.
100 000 N per square metre. A pressure of 1 N · m2 is called one pascal (Pa).
a lobe-shaped orbital in which electrons may move. There are 3 p orbitals per energy level from...