Periodic table

Front

What is the periodic law?

Back

The periodic law states that the properties of elements are a periodic function of their atomic numbers.

Front

What are valence electrons?

Back

Valence electrons are the electrons in the outermost shell of an atom that are involved in chemical bonding.

Front

How does atomic radius change across a period?

Back

Atomic radius decreases from left to right across a period due to increased nuclear charge pulling electrons closer.

Front

What is ionization energy?

Back

Ionization energy is the energy required to remove an electron from an atom in its gaseous state.

Front

What is electron affinity?

Back

Electron affinity is the amount of energy released when an electron is added to a neutral atom.

Front

Why do halogens become more reactive as you go up the group?

Back

Halogens become more reactive as you go up the group because they have fewer electron shells, resulting in less electron shielding and a stronger attraction for additional electrons.

Front

What is the trend of reactivity in alkali metals?

Back

Reactivity of alkali metals increases as you move down the group due to the increase in atomic size and decrease in ionization energy.

Front

What is electronegativity?

Back

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

Front

Which group of elements has the highest electronegativity?

Back

The halogens have the highest electronegativity among the groups in the periodic table.

Front

What is the significance of the periodic table?

Back

The periodic table organizes elements based on their atomic number, electron configuration, and recurring chemical properties.