Midterm Review 2024

Front

What do elements in the same group share in terms of chemical properties?

Back

They have similar chemical properties.

Front

Which of the following is NOT a characteristic of elements in the same group?

Back

Different outer shell electron configuration.

Front

What is the half-life of Uranium-235 compared to Carbon-14?

Back

Uranium-235 has a longer half-life than Carbon-14.

Front

What is thermal equilibrium?

Back

When heat is no longer flowing between systems or substances.

Front

What happens to kinetic energy when temperature increases?

Back

Kinetic energy also increases.

Front

What is the significance of valence electrons in chemical properties?

Back

Elements in the same group have the same number of valence electrons, leading to similar chemical properties.

Front

Define half-life in the context of radioactive decay.

Back

Half-life is the time required for half of the radioactive atoms in a sample to decay.

Front

What is the difference between thermal and mechanical equilibrium?

Back

Thermal equilibrium refers to no heat flow, while mechanical equilibrium refers to no net force acting on a system.

Front

How does the number of electron shells affect the properties of elements in the same group?

Back

Elements may have different numbers of electron shells but still share similar chemical properties due to their valence electrons.

Front

What is the relationship between temperature and thermal energy?

Back

As temperature increases, thermal energy also increases.