🎓 10th Samacheer Quiz
TRUE_FALSE

Atoms and Molecules

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Q1. An element can be broken into simpler substances by ordinary chemical methods.
Q2. A compound contains elements combined chemically in fixed proportions.
Q3. A molecule of oxygen gas is O2.
Q4. A molecule can consist of two or more atoms.
Q5. Atomic number and mass number are always equal.
Q6. Atoms contain a nucleus and electrons.
Q7. Mass is conserved in a closed chemical reaction system.