They
Select True or False. Radioactive decay occurs when a stable isotope changes into an unstable one.
What is false
A reaction whose products have less energy than the reactants is a(n) reaction ______.
What is exothermic?
Select the nuclear reaction which is associated with the following clue:
A large nucleus is split into smaller nuclei.
A)fission
B)fusion
What is fission?
Select True or False. Forces continue to act upon a system once it reaches equilibrium.
What is true?
Select True or False. According to Le Châtelier’s principle, systems in equilibrium cannot be changed.
What is false?
Gamma decay involves the emission of a(n) ______.
What is gamma ray or photon?
Select True or False. Enzymes slow the rate of a reaction by reducing the effect of the catalysts.
What is false
What holds protons and neutrons together inside atomic nuclei?
What is strong force?
Write the balanced chemical equation for the following word equation: Sodium combines with diatomic iodine to form sodium iodide.
2Na+I2 -> 2NaI
Select True or False. Nuclear changes alter substances by breaking and forming bonds to rearrange atoms.
What is false?
Select the nuclear reaction which is associated with the following clue:
Small nuclei combine to form a more massive nucleus.
A)fission
B)fusion
What is fusion?
The substances that enter into a chemical reaction are called ——-
what is reactants?
Radiation damage that affects the reproduction and growth of new cells is called _________.
What is genetic damage?
The rate at which an isotope decays is called its _________.
What is half-life?
Write the balanced chemical equation for the following word equation: Potassium chlorate (KClO 3) decomposes to form potassium chloride and diatomic oxygen.
2KClO3 -> 2KCL +3O2
Write the balanced chemical equation for the following word equation: Sulfuric acid (H 2SO 4) decomposes to form sulfur trioxide plus water.
H2SO4 -> SO3+H2O
Why is sustainable fusion so difficult to achieve in laboratories?
Fusion requires extreme pressures and temperatures such as what is found in the sun’s core.
List four evidences that a chemical change has occurred.
Accept any four of the following: (1) Bubbles are observed. (2) A precipitate is observed. (3) Energy is released. (4) Light is produced. (5) Odor is observed. (6) A color change is observed. (7) A temperature change is observed. (8) A composition change is observed. (9) Burning is observed.
Identify three ways that radioactivity is being used in medical technology.
Accept any three of the following: (1) in x-rays, (2) in computed tomography (CT scans), (3) as medicine to treat cancer or other diseases, (4) in radiotracers to help diagnose illnesses.
A reaction that absorbs more energy than it releases is a(n) -_____ reaction.
What is endothermic?