IGCSE A Level Chemistry Practice Test 349
Atoms and Molecules Mass Quiz Questions and Answers PDF Download - 349
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Atoms and Molecules Mass Questions and Answers PDF Download: MCQ 349
The sum of protons (p+) and neutrons (n0) in an atom is called its
- atomic number
- nucleon number
- Avogadro's number
- protonic identity
In concentration of gases, the molecules are further apart due to the decrease in
- volume
- pressure
- density
- inert
Solids are mostly denser than
- liquids
- gases
- noble gases
- alkalis
Metal that reacts vigorously with cold water to produce a strongly alkaline solution is
- Na(s)
- Mg(s)
- Al(s)
- S(s)
The decrease in the force of attraction is due to the increase in the
- distance only
- shielding effect only
- number of electrons
- distance and shielding effect
IGCSE A Level Chemistry Exam Prep Tests
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