Electrons configuration

Front

What is electron configuration?

Back

The distribution of electrons in an atom's orbitals, described by a series of numbers and letters (e.g., 1s2 2s2 2p6).

Front

What does the octet rule state?

Back

Atoms tend to gain, lose, or share electrons to achieve a full outer shell of eight electrons, leading to greater stability.

Front

What is a valence electron?

Back

An electron in the outermost shell of an atom that can participate in chemical bonding.

Front

How do you determine the valence electrons for an element?

Back

By looking at the highest principal energy level in its electron configuration.

Front

What is the significance of the 3s orbital for potassium (K)?

Back

The 3s orbital contains the valence electron for potassium, which is crucial for its chemical reactivity.

Front

What happens to ionization energy as you move across a period in the periodic table?

Back

Ionization energy generally increases due to increased nuclear charge and decreased atomic radius.

Front

What is ionization energy?

Back

The energy required to remove an electron from an atom in its gaseous state.

Front

Why does the third ionization energy of calcium show a sudden increase?

Back

Because the third electron is removed from a shell closer to the nucleus, experiencing less shielding.

Front

What is the difference between first and second ionization energy?

Back

The first ionization energy is the energy needed to remove the first electron, while the second is for removing a second electron from a positively charged ion.

Front

What is the shielding effect?

Back

The phenomenon where inner electrons reduce the effective nuclear charge felt by outer electrons, affecting ionization energy.