Chemistry Midterm 2024

Front

What is density?

Back

Density is a measure of mass per unit volume, commonly expressed in units such as grams per milliliter (g/mL).

Front

What are the units used to express density?

Back

Density can be expressed in units such as g/mL, kg/m³, or g/cm³.

Front

What is the name of Group 17 in the periodic table?

Back

Group 17 is known as the Halogens.

Front

What are Halogens?

Back

Halogens are a group of elements in Group 17 of the periodic table, including fluorine, chlorine, bromine, iodine, and astatine.

Front

What is the electron configuration of Magnesium?

Back

The electron configuration of Magnesium is 1s² 2s² 2p⁶ 3s².

Front

When do atoms emit photons?

Back

Atoms emit photons when an electron transitions from an excited state to a ground state.

Front

What is the electron configuration of an oxygen atom?

Back

The electron configuration of an oxygen atom is 1s² 2s² 2p⁴.

Front

What is the significance of electron configurations?

Back

Electron configurations determine the chemical properties and reactivity of an element.

Front

What are the main groups of the periodic table?

Back

The main groups include Alkali Metals (Group 1), Alkaline Earth Metals (Group 2), Transition Metals (Groups 3-12), Halogens (Group 17), and Noble Gases (Group 18).

Front

What is the ground state of an electron?

Back

The ground state of an electron is the lowest energy state of an atom, where electrons occupy the lowest available energy levels.