I think you meant to say something along the lines of "which particle can be easily removed from an atom?" And the answer to that is the electron. You could go to wikipedia or something for more information about it.
The past participle of remove is removed.
First ionization increases because in an atom when we remove first electron of the atom it can be removed easily while as we move to second electron it can't be remove easily because second electron is more near to nucleus and it faces more force of attraction than first one.
No. It's the only part of an atom that may leave or join an atom easily. Nuclear fusion and fission add or remove other particles like neutrons and protons.
The word "removed" is the verb "remove" in its past participle form. This past participle completes the full verb phrase (which is in passive voice) in the sentence, "can be removed".
insulator
A conductor
The valence electron of a lithium atom is in the 2s orbital. It is easily removed to form a lithium ion with a charge of +1 because lithium only has one valence electron, making it relatively easy to lose.
An electron can be removed from an atom by supplying it with energy, such as through heat, light, or electricity. This process is known as ionization, and it results in the atom becoming a positively charged ion.
Ionization EnergyIonization energy is the amount of energy required to remove one electron from an atom, molecule or ion. You can also measure the 2nd IE, which is the energy required to remove the second electron, and so on. IEs of atoms are strictly positive numbers as it always requires energy to remove an electron (also, the 2nd IE is greater than the 1st, and the 3rd greater than the 2nd, etc.) The magnitude of the IE is for atoms is a function of something called the effective nuclear charge, which is a complicated function of the actual nuclear charge (the # of protons in the nucleus).
The energy required to remove an electron from a neutral atom is the atom's ionization energy. It represents the amount of energy needed to remove the most loosely bound electron from an atom in its gaseous state.
advanced - past participle beginning - present participle, easily identified by the " ing " ending.
Some particles can cross easily the atom.