AP QUIZZES - AP TOPIC 2 Atoms, Ions & Nomenclature SET D
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QUESTION 1. A chemical reaction is observed in a sealed container where new products are formed, a gas is released and there is a change of color. There is no change in mass. Which part of Dalton's theory does this illustrate?

(A) Law of conservation of mass
(B) Law of constant composition
(C) The existence of isotopes
(D) The existence of small particles called atoms
(E) The fact that all atoms of the same element are identical

QUESTION 2. What is the chemical symbol for Tungsten?

(A) T
(B) Tu
(C) Tw
(D) Tg
(E) W

QUESTION 3. Which of the following statements is correct?

(A) An electron has approximately 1/2000 of the mass of a proton
(B) A proton has approximately 1/2000 of the mass of an electron
(C) Neutrons have no mass and no charge
(D) All atoms of a particular element are identical
(E) Different ratios of atoms produce the same compounds

QUESTION 4. Who is credited with the discovery of the neutron?

(A) Millikan
(B) Rutherford
(C) Chadwick
(D) Marsden
(E) Geiger

QUESTION 5. What is the average atomic mass of a sample of naturally occuring X, if it is comprised of the following isotopes; 47% 51X, 17% 52X and 36% 56X?

(A) 56.00
(B) 51.00
(C) 54.67
(D) 54.34
(E) 52.97




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