Binary Ionic and Molecular Compounds

Sort the compounds in to th correct category.

Groups:

(a) Molecular

,

(b) Ionic

• Na₂S

• NO

• MgO

• Ca₃N₂

• Cl₂

• Lithium chloride

• CH₄

• Triphosphorus tetrabromide

• Aluminum fluoride

• Iodine gas

Which of the following is false about ionic compounds?

• They are made with a metal and a nonmetal

• They form when cations transfer electrons to an anion

• They are held together by ionic bonds

• They form when nonmetals share electrons

Which of the following is false about molecular compounds?

• They are formed with covalent bonds

• They are made when a metal transfers electrons to a nonmetal

• They are formed by a nonmetal and a nonmetal

• They are made by sharing electrons

A cation is?

• A cation is a positively charged metal ion.

• A cation is a molecule with no charge.
• A cation is a neutral atom.
• A cation is a negatively charged ion.

An anion is?

• A positively charged metal ion.

• A neutral element

• An atom without a charge

• A negatively charged nonmetal ion.

What is a diatomic molecule?

• A diatomic molecule is a when a cation and an anion split apart to form a new compound

• A diatomic molecule consists of two different elements bonded together

• A diatomic molecule is dangerous molecule with a high pH

• A diatomic molecule is a molecule composed of two of the same type of atoms sharing electrons

Which statement best describes a covalent bond?

• A covalent bond is formed when a cation and an anion combine.

• A covalent bond is the attraction between oppositely charged ions.

• A covalent bond is formed when a metal donates electrons to a nonmetal.

• A covalent bond is formed when electrons are shared between two nonmetals.

What type of elements typically form ionic compounds?

• Two metals

• A metal and a nonmetal

• Two nonmetals

• A noble gas and a nonmetal

Which of the following is true about anions?

• Anions are always metals.

• Anions are negatively charged ions formed when atoms gain electrons.

• Anions are formed when atoms lose electrons.

• Anions are positively charged ions.

Which pair of elements is most likely to form a molecular compound?

• Sodium and chlorine

• Potassium and bromine

• Magnesium and oxygen

• Hydrogen and oxygen