Is there a trend for ionic radius?

The size of an element’s ionic radius follows a predictable trend on the periodic table. As you move down a column or group, the ionic radius increases. This is because each row adds a new electron shell. Ionic radius decreases moving from left to right across a row or period.

What is the ionic radius of magnesium?

173 pmMagnesium / Van der Waals radius

Why does magnesium have a smaller radius?

Magnesium atom is smaller than sodium atom because the nuclear charge of Magnesium ( 12+ ) is higher than that of Sodium ( 11+ ). Magnesium nucleus will attract the electrons more toward it and therefore, shrinking the size of the atom.

What represents increasing ionic radius?

When a negative ion is formed, one or more electrons are added to an atom and the effective nuclear charge is reduced. The electron cloud expands and the size of negative ion becomes more. Hence, the correct order of increasing ionic radii is Mg2+.

What does ionic radius depend on?

Atomic and Ionic Radii The size of an atom or ion depends on the size of the nucleus and the number of electrons. Generally atoms with higher numbers of electrons have larger radii than those with smaller numbers of electrons.

What affects ionic radius?

Ionic size (for the same ion) also increases with increasing coordination number, and an ion in a high-spin state will be larger than the same ion in a low-spin state. In general, ionic radius decreases with increasing positive charge and increases with increasing negative charge.

What is the trend in atomic radius from left to right across a period?

The atomic radius of atoms generally decreases from left to right across a period. The atomic radius of atoms generally increases from top to bottom within a group.

Which element has a smaller ionic radius than magnesium?

Since chlorine’s 17 protons are greater than magnesium’s 12 protons, chlorine will have a greater effective nuclear charge to draw chlorine’s valence electrons closer to the nucleus and, thus, chlorine is expected to have the smaller atomic radius, while magnesium with the lower effective nuclear charge is expected to …

Which of Na+ and mg2+ is the smaller ion?

mg2+ would be the smaller ion this is because each ion has the same number of electrons however mg2+ has a greater number of protons and therefore is more charge dense and the outer electrons feel a greater pull from the nucleus.

What will be the increasing ionic radius order of following ions O2 − Na+ Mg2+ and F −?

The correct order of increasing ionic radii is : Mg2+ < Na+ < F− < O2−.