Chemistry Final Exam S24

Front

What is the correct way to write a chemical formula?

Back

The correct way to write a chemical formula includes the symbols of the elements followed by subscripts indicating the number of atoms of each element. For example, H2O for water.

Front

What is orbital notation?

Back

Orbital notation is a way of representing the arrangement of electrons in an atom's orbitals using arrows to indicate the spin of electrons.

Front

What do elements in the same group of the periodic table have in common?

Back

Elements in the same group have the same number of valence electrons, which determines their chemical properties.

Front

How many lone pairs are in the ammonia molecule (NH3)?

Back

Ammonia (NH3) has 1 lone pair of electrons on the nitrogen atom.

Front

What is ionic bonding?

Back

Ionic bonding involves the transfer of electrons from one atom to another, resulting in the formation of positively and negatively charged ions.

Front

Define valence electrons.

Back

Valence electrons are the electrons in the outermost shell of an atom that are involved in forming bonds.

Front

What is the significance of the periodic table's groups?

Back

The groups in the periodic table indicate elements that have similar chemical properties due to having the same number of valence electrons.

Front

What is the difference between ionic and covalent bonds?

Back

Ionic bonds involve the transfer of electrons, while covalent bonds involve the sharing of electrons between atoms.

Front

What is a lone pair of electrons?

Back

A lone pair of electrons is a pair of valence electrons that are not shared with another atom and are not involved in bonding.

Front

What is the electron configuration for Bromine (Br)?

Back

The electron configuration for Bromine (Br) is [Ar] 4s2 3d10 4p5.