Periodic Table Trends 2024

Front

What is the least reactive element in the periodic table?

Back

Neon (Ne) is the least reactive element due to its full valence shell.

Front

What are the elements located along the stair step line in the periodic table called?

Back

The elements along the stair step line are called metalloids.

Front

Which element has the most valence electrons among Cl, S, P, and Al?

Back

Chlorine (Cl) has the most valence electrons, with 7.

Front

What is the effective nuclear charge of magnesium?

Back

The effective nuclear charge of magnesium is +2.

Front

What sequence corresponds to an increase in ionization energy?

Back

The sequence Cl > S > P > Al corresponds to an increase in ionization energy.

Front

Define ionization energy.

Back

Ionization energy is the energy required to remove an electron from an atom in the gas phase.

Front

What trend in reactivity is observed as you move down a group in the periodic table for metals?

Back

Reactivity increases as you move down a group for metals.

Front

What is the trend in electronegativity across a period in the periodic table?

Back

Electronegativity increases across a period from left to right.

Front

What are the main characteristics of metalloids?

Back

Metalloids have properties intermediate between metals and nonmetals; they can conduct electricity and are often semiconductors.

Front

How does atomic radius change as you move down a group in the periodic table?

Back

Atomic radius increases as you move down a group due to the addition of electron shells.