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IGCSE A Level Chemistry Practice Test 349

Atoms and Molecules Mass Quiz Questions and Answers PDF - 349

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Atoms and Molecules Mass Quiz Answers PDF Download: Test 349

MCQ 1741: The sum of protons (p+) and neutrons (n0) in an atom is called its

A) atomic number
B) nucleon number
C) Avogadro's number
D) protonic identity

MCQ 1742: In concentration of gases, the molecules are further apart due to the decrease in

A) volume
B) pressure
C) density
D) inert

MCQ 1743: Solids are mostly denser than

A) liquids
B) gases
C) noble gases
D) alkalis

MCQ 1744: Metal that reacts vigorously with cold water to produce a strongly alkaline solution is

A) Na(s)
B) Mg(s)
C) Al(s)
D) S(s)

MCQ 1745: The decrease in the force of attraction is due to the increase in the

A) distance only
B) shielding effect only
C) number of electrons
D) distance and shielding effect

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