UNIT 4 REVIEW

Front

Electron dot symbol of an atom of boron in the ground state? Options: ·B·, B·, ·B:, B:

Back

·B:

Front

Which electron dot diagram represents H₂? Options: H·H, H:H, ·H:H·, ·:H:H:·

Back

H:H

Front

What is represented by the dots in a Lewis electron-dot diagram of an atom of an element in Period 2 of the Periodic Table?

Back

the number of valence electrons in the atom

Front

Which kind of bond is formed when two atoms share electrons to form a molecule?

Back

covalent

Front

The P–Cl bond in a molecule of PCl₃ is

Back

polar covalent

Front

The bonds present in silicon carbide (SiC) are: covalent, ionic, metallic, van der Waals

Back

covalent

Front

Which type of bond is present in copper wire?

Back

metallic

Front

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

Back

It contains ionic bonds and has a high melting point.

Front

The bonds between hydrogen and oxygen in a water molecule are classified as: polar covalent, nonpolar covalent, ionic, metallic

Back

polar covalent

Front

The bonds in BaO are best described as

Back

ionic, because valence electrons are shared