Midterm Review 2024

Front

What is a characteristic of elements in the same group?

Back

Elements in the same group have similar chemical properties and the same number of valence electrons.

Front

What is the electron configuration of Manganese (Mn)?

Back

1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d⁵

Front

What is the term for the kinetic energy of a substance's atoms?

Back

Thermal energy.

Front

What are Hypoxic Zones?

Back

Areas of oceans and rivers where the amount of dissolved oxygen is so low that it no longer supports life.

Front

Is it true that Uranium-235 is ideal for radiometric dating of fossils because its half-life is longer than that of carbon-14?

Back

True.

Front

What is the definition of valence electrons?

Back

Valence electrons are the electrons in the outermost shell of an atom that are involved in forming bonds.

Front

What is the significance of half-life in radioactive decay?

Back

Half-life is the time required for half of the radioactive atoms in a sample to decay, which helps in dating materials.

Front

What is the difference between potential energy and kinetic energy?

Back

Potential energy is stored energy based on position, while kinetic energy is the energy of motion.

Front

What is the definition of chemical energy?

Back

Chemical energy is the energy stored in the bonds of chemical compounds, like atoms and molecules.

Front

What is the role of dissolved oxygen in aquatic ecosystems?

Back

Dissolved oxygen is essential for the survival of aquatic life; low levels can lead to hypoxic conditions.