Question

question 12 (1 point)
what does the law of conservation of energy state?
a energy remains constant and can only be transformed, not created or destroyed
b only kinetic energy can be conserved in a system
c energy can be created and destroyed as needed
d energy decreases over time in a closed system

question 13 (1 point)
in a chemical reaction like combustion, energy is released as heat and light.
true
false

question 14 (1 point)
what does the inverter magnet model represent in atomic systems?
a the periodic table arrangement.
b only the electrons in an atom.
c a nucleus with no surrounding electrons.
d the interaction between charged particles.

Explanation:

Question 12:

The law of conservation of energy is a fundamental physical and chemical principle stating that the total energy in a closed system is fixed; it can only change form, not be made or destroyed. Options b, c, and d contradict this definition.

Question 13:

Combustion is an exothermic chemical reaction, which releases energy in the form of heat and visible light, so the statement is correct.

Question 14:

The inverter magnet model (also called the magnetic dipole model) describes the interactions between charged particles (like electrons and the nucleus) in atomic systems, as these particles have magnetic properties that influence each other. The other options do not match the model's purpose.

Answer:

Question 12: a. Energy remains constant and can only be transformed, not created or destroyed
Question 13: True
Question 14: d. The interaction between charged particles.