Copy of Skill Check #1.3 (Unit 1 Investigation 1 Experience 3) (7/30/2025)

CH₄ + 2CO₂ → 2O₂ + 2H₂0

CH₄ + CO₂ → O₂ + H₂0

2CH₄ + 2O₂ → 2CO₂ + 2H₂0

CH₄ + 2O₂ → CO₂ + 2H₂0

Na + Cl₂ → NaCl

2Na + Cl₂ → 2NaCl

Na + Cl → NaCl

2Na + Cl₂ → NaCl₂

electron

ion

neutron

proton

1 and 2

2, 3, and 4

1 and 3

2 and 3

Breaking an atom apart into two smaller atoms is called fusion.

During nuclear reactions, energy is not conserved but mass is.

During nuclear reactions, mass is not conserved but energy is.

Combining two smaller atoms into a larger atom is called fission.