Semester Review Ionic, Covalent, and EMS and sig figs

Front

What shape do molecules like boron trichloride have when they have three bonded atoms and no unshared pairs?

Back

trigonal planar

Front

What are electrons called that are free to move in metals?

Back

delocalized electrons

Front

When naming ionic compounds with transition metals, what must be included to show the charge of the metal?

Back

Roman numerals

Front

What is the formula for hydrochloric acid?

Back

HCl

Front

What is the name of the compound LiBr?

Back

lithium bromide

Front

What type of bond involves the sharing of electron pairs between atoms?

Back

Covalent bond

Front

What is the charge of a sodium ion (Na+)?

Back

+1

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.

Front

What is the significance of significant figures in measurements?

Back

Significant figures indicate the precision of a measurement.

Front

What is the formula for calculating the number of significant figures in a measurement?

Back

Count all non-zero digits, any zeros between them, and trailing zeros only if there is a decimal point.