Bonding unit

Given the electron dot diagram above, Which electrons are represented by all of the dots?

• the carbon valence electrons, only

• the hydrogen valence electrons, only

• the carbon and hydrogen valence electrons

• all of the carbon and hydrogen electrons

Which term indicates how strongly an atom attracts the electrons in a chemical bond?

• Atomic Mass

• Electronegativity

• Solubility

• Conductivity

Which pair of elements below will form a compound with the greatest ionic character?

• Pb and F

• Ca and O

• Na and Cl

• Cs and N

Which substance contains bonds that involved the transfer of electrons from one atom to another?

• NH₃

• CO₂

• KBr

• Cl₂

Which statement best describes the substance that results when electrons are transferred from a metal to a nonmetal?

• It contains ionic bonds and has a low melting point.

• It contains ionic bonds and has a high melting point

• It contains covalent bonds and has a low melting point.

• It contains covalent bonds and has a high melting point.

The chemical bond between which two atoms is most polar?

• C–N

• H–H

• S–Cl

• Si–O

Which type of bonding involves positive ions immersed in a sea of mobile electrons?

• Ionic

• Nonpolar Covalent

• Polar Covalent

• Metallic

Which terms describe a substance that has a lowmelting point and poor electrical conductivity?

• covalent and metallic

• covalent and molecular

• ionic and molecular

• ionic and metallic

What is the total number of electrons shared in a double covalent bond?

• 1

• 2

• 4

• 6

Which formula represents a nonpolar molecule?

• CH₄

• HCl

• H₂O

• NH₃