2024 Review

Front

Why does a higher concentration make a reaction faster?

Back

Higher concentration increases the frequency of collisions between reactant molecules, leading to a higher rate of reaction.

Front

What is the stable ion for Barium (Ba)?

Back

Ba²⁺ is the stable ion for Barium.

Front

What types of ionizing radiation can penetrate through paper, skin, aluminum foil, and wood?

Back

Gamma rays can penetrate through paper, skin, aluminum foil, and wood.

Front

What type of reaction is NaNO₃ + 2KI → NaI + KNO₃?

Back

This is a double replacement reaction.

Front

How do particles in a piece of steel move?

Back

All particles in a piece of steel are moving.

Front

What is the effect of increasing temperature on reaction rates?

Back

Increasing temperature generally increases reaction rates by providing more energy to the reactant molecules, leading to more frequent and effective collisions.

Front

Define activation energy.

Back

Activation energy is the minimum energy required for a chemical reaction to occur.

Front

What is a double replacement reaction?

Back

A double replacement reaction is a type of chemical reaction where two compounds exchange ions or bonds to form two new compounds.

Front

What are beta particles?

Back

Beta particles are high-energy, high-speed electrons or positrons emitted by certain types of radioactive nuclei.

Front

What is the difference between alpha, beta, and gamma radiation?

Back

Alpha radiation consists of helium nuclei, beta radiation consists of electrons or positrons, and gamma radiation consists of high-energy photons.