ch2questions

ch2questions - CHAPTER 2 - QUESTIONS History 1. Which...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
CHAPTER 2 - QUESTIONS History 1. Which assumptions of Dalton’s atomic theory had to be revised or discarded because of the existence of stable isotopes? (A) The ultimate particles of matter are the atoms of elements, which are indivisible and indestructible. (B) All the atoms of a given element are alike in all respects. (C) The atoms of different elements differ in one or more properties. (D) Compounds are formed by combination of different kinds of atoms. 2. When alpha particles were shot at a gold foil target, most of the particles were undeflected. This indicated to Rutherford that (A) the gold foil was continuous matter. (B) the mass of the gold atoms was spread out thinly. (C) the atoms of gold were mostly empty space. (D) the alpha particles had great penetrating power. (E) the alpha particles had charges opposite to those on the nuclei 3. The atomic nucleus was discovered experimentally by: (A) William Crookes using a cathode ray tube (B) Millikan using a cathode ray tube (C) J. J. Thomas using a beam of alpha particles (D) Ernest Rutherford using a beam of alpha particles (E) Ernest Rutherford using a cathode ray tube Percent by Mass 4. What is the percentage of nitrogen by mass in (NH 4 ) 3 PO 4 ? (A) 22.6% (B) 12.4% (C) 26.3% (D) 28.2% 5. The percent by mass of oxygen in Ca(NO 3 ) 2 is (A) 22.8% (B) 94.0% (C) 58.5% (D) 47.0% (E) 29.3% 6. Calcium carbonate is 40% calcium and 48% oxygen by mass. What mass of carbon is contained in 150 lb of calcium carbonate? (A) 12 g (B) 60 lb (C) 18 lb (D) 72 lb (E) 12 lb 7. Which of the following compounds has the largest percent nitrogen by mass? (A) N 2 H 4 (B) NH 3 (C) Li 3 N (D) NaN 3 (E) Li 2 NH 1
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Atomic Structure 8. The number of neutrons in the nucleus of a specific atom is equal to its (A) atomic mass. (B) mass number. (C) atomic number. (D) mass number - atomic number. 9. In all neutral atoms, there are equal numbers of (A) protons and neutrons. (C) neutrons and electrons. (B)
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 5

ch2questions - CHAPTER 2 - QUESTIONS History 1. Which...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online