Practice: Semester Exam Fall 2024

Front

What is atomic mass?

Back

Atomic mass is the mass of an atom, typically expressed in atomic mass units (amu), which reflects the number of protons and neutrons in the nucleus.

Front

Where is fluorine (F) located in the periodic table?

Back

Fluorine (F) is located in group 17 of the periodic table.

Front

What are metals?

Back

Metals are elements that are shiny, conduct electricity and heat, and are malleable and ductile.

Front

How do you calculate the molar mass of a compound?

Back

To calculate the molar mass, sum the atomic masses of all atoms in the compound's formula.

Front

What is the formula for density?

Back

Density is calculated using the formula: Density = Mass/Volume.

Front

What is the atomic number?

Back

The atomic number is the number of protons in the nucleus of an atom, which determines the element's identity.

Front

What is the significance of group 17 in the periodic table?

Back

Group 17 contains the halogens, which are highly reactive nonmetals.

Front

What is the difference between metals and nonmetals?

Back

Metals are good conductors of heat and electricity, while nonmetals are poor conductors and often have more varied physical properties.

Front

What is a metalloid?

Back

Metalloids are elements that have properties of both metals and nonmetals, and they are semiconductors.

Front

How do you find the molar mass of KOH?

Back

The molar mass of KOH is calculated by adding the atomic masses of potassium (K), oxygen (O), and hydrogen (H).