Electron Configuration & Periodic Trends

Front

What is electron configuration?

Back

The distribution of electrons in an atom's orbitals, indicating the energy levels and sublevels occupied by electrons.

Front

What is the electron configuration for a neutral Calcium (Ca) atom?

Back

1s² 2s² 2p⁶ 3s² 3p⁶ 4s²

Front

What is the electron configuration for Ca²⁺?

Back

1s² 2s² 2p⁶ 3s² 3p⁶ (removing two electrons from the 4s orbital).

Front

Which element has the electron configuration 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰?

Back

Zinc (Zn).

Front

What is electronegativity?

Back

A measure of the tendency of an atom to attract a bonding pair of electrons.

Front

Which element has the highest electronegativity: Na, Mg, Si, Cl?

Back

Chlorine (Cl).

Front

How does electronegativity change in the halogen family from fluorine to iodine?

Back

Electronegativity decreases and atomic radius increases.

Front

What is the trend in atomic radius as you move down a group in the periodic table?

Back

Atomic radius increases due to the addition of electron shells.

Front

Which color of visible light has the lowest energy?

Back

Red.

Front

What is the general trend of ionization energy across a period?

Back

Ionization energy increases as you move from left to right across a period.