Study Guide

Front

What is the molecular geometry of a molecule with a bent shape?

Back

A molecule with a bent shape typically has trigonal planar geometry with one lone pair of electrons.

Front

What is the relationship between sodium (Na) and potassium (K) in terms of their orbital shells?

Back

Sodium has fewer orbital shells than potassium.

Front

What is the predicted molecular shape of beryllium chloride based on its electron dot formula?

Back

The molecular shape of beryllium chloride is linear.

Front

What is the average atomic mass of strontium based on its natural isotope abundance?

Back

The average atomic mass of strontium is 87.7 amu.

Front

What is the electron configuration of aluminum (atomic number 13)?

Back

The electron configuration of aluminum is 1s2 2s2 2p6 3s2 3p1.

Front

Define molecular geometry.

Back

Molecular geometry refers to the three-dimensional arrangement of atoms within a molecule.

Front

What is the significance of lone pairs in determining molecular shape?

Back

Lone pairs can repel bonding pairs of electrons, affecting the overall shape of the molecule.

Front

Explain the concept of electronegativity.

Back

Electronegativity is the tendency of an atom to attract electrons in a chemical bond.

Front

What is the periodic trend for ionization energy?

Back

Ionization energy generally increases across a period and decreases down a group in the periodic table.

Front

What is the difference between atomic mass and average atomic mass?

Back

Atomic mass is the mass of a single atom, while average atomic mass is the weighted average of all isotopes of an element.