Chemistry A Semester Exam Practice Flashcard

Front

What is the weakest type of bond among the following: Double covalent bond, Single covalent bond, Hydrogen bond, Ionic bond?

Back

Hydrogen bond

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

How many significant figures does the result of the calculation 45.62 m − 3.1 m have?

Back

2

Front

Is the molecule polar or nonpolar if it has a symmetrical linear shape and the dipoles cancel out?

Back

Nonpolar, because the molecule has a symmetrical linear shape and the dipoles cancel out.

Front

Why do elements in the same group on the periodic table have similar properties?

Back

They have the same number of valence electrons.

Front

Define a covalent bond.

Back

A covalent bond is a chemical bond that involves the sharing of electron pairs between atoms.

Front

What is an ionic bond?

Back

An ionic bond is a chemical bond formed through the transfer of electrons from one atom to another, resulting in the formation of charged ions.

Front

What are significant figures?

Back

Significant figures are the digits in a number that contribute to its precision, including all non-zero digits, zeros between significant digits, and trailing zeros in the decimal portion.

Front

What determines if a molecule is polar or nonpolar?

Back

A molecule is polar if it has an uneven distribution of electron density, leading to a dipole moment; it is nonpolar if the electron distribution is even.

Front

What is electronegativity?

Back

Electronegativity is a measure of the tendency of an atom to attract a bonding pair of electrons.