Chemistry Fall Semester Review 2024

Front

What does the mass on the periodic table represent?

Back

The mass represents the atomic mass unit, and average atomic mass is calculated by taking the weighted average of all isotopes.

Front

How is average atomic mass calculated?

Back

Average atomic mass is calculated by taking the weighted average of all isotopes.

Front

Convert 4.58 grams of C to atoms. What is the result?

Back

2.29 x 10^23 atoms.

Front

If elements have small electronegativity differences between them, they form what type of compounds?

Back

Covalent compounds.

Front

What is the process used to determine the Empirical Formulas?

Back

By calculating the ratio of moles of each element present in the compound.

Front

What are oxidation numbers specific for?

Back

Oxidation numbers are specific for ions.

Front

Define atomic mass unit (amu).

Back

Atomic mass unit (amu) is a standard unit of mass that quantifies mass on an atomic or molecular scale.

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 electronegativity in chemical bonding?

Back

Electronegativity determines how strongly an atom attracts electrons in a bond.

Front

How do you calculate the number of moles from grams?

Back

Number of moles = mass (g) / molar mass (g/mol).