All actinides are radioactive, with many being synthetic and unstable.

Addition polymers are formed from unsaturated monomers through addition reactions.

Aldehydes are generally more reactive than ketones due to the presence of the hydrogen atom attached to the carbonyl carbon.

Alkali metals are good conductors of electricity due to their free-moving electrons.

Alkaline earth metals have a higher density than alkali metals.

Alkanes are non-polar molecules and are generally insoluble in water.

Alkenes are unsaturated hydrocarbons due to the presence of at least one double bond.

Alkynes contain at least one triple bond between carbon atoms.

All polygons are defined as closed figures formed by a finite number of line segments.

In a regular polygon, all sides and all interior angles are equal.

Amorphous solids are isotropic, meaning their properties are the same in all directions, unlike crystalline solids.

An isosceles triangle is defined as having at least two sides that are equal in length.

Aromatic compounds are characterized by a planar structure and exhibit unique stability due to resonance, but they are generally less reactive than alkenes.

Aromatic hydrocarbons contain a benzene ring.

Bases have a bitter taste and turn red litmus paper blue, while acids do the opposite.

Carboxylic acids have high boiling points due to hydrogen bonding.

Covalent network solids, such as diamond, have very high melting points due to the strong covalent bonds throughout the structure.

Cycloalkanes have a ring structure and can be saturated or unsaturated depending on the number of hydrogen atoms.

Diatomic hydrogen (H2) is highly flammable and can easily ignite in the presence of oxygen.

Elastomers are known for their elastic properties, allowing them to stretch and return to their original shape.

Electric field lines cannot intersect because it would imply two different directions of the electric field at a point.

Ethers are generally flammable due to their hydrocarbon nature, although they have moderate boiling points.

Fluids are often considered incompressible for practical purposes, especially in hydrodynamics.

Group 13 elements typically form covalent compounds due to their electron configuration.

Group 14 elements typically form covalent bonds due to their tetravalent nature.

Group 14 p-block elements typically form covalent bonds due to their valence electron configuration.

Group 15 elements, such as phosphorus, exist in multiple allotropes.

Group 17 elements, also known as halogens, are highly electronegative.

Halogens exist as diatomic molecules (e.g., Cl2, F2) in their elemental form.

Halogens exist as diatomic molecules (e.g., Cl2, F2).