Chapter 2 Pre-Test sections 2.1-2.7

A the plum pudding model of the atom was incorrect b

Info iconThis preview shows pages 2–4. Sign up to view the full content.

View Full Document Right Arrow Icon
a. the "plum-pudding" model of the atom was incorrect b. most of the mass of an atom is concentrated in a tiny portion of its total volume c. the positively charged particles within an atom are concentrated in a tiny portion of its volume d. α -particles are less massive than gold nuclei e. all of these are correct 10. There are _____ electrons, _____ protons, and _____ neutrons in an 132 atom of 54 Xe. a. 132, 132, 54 b. 54, 54, 132 c. 78, 78, 54 d. 54, 54, 78 e. 78, 78, 132 11. Which isotope has 45 neutrons? a. 80 36 Kr b. 80 35 Br c. 78 34 Se d. 34 17 Cl e. 103 45 Rh 12. Which isotope has 36 electrons in an atom? a. 80 36 Kr b. 80 35 Br c. 78 34 Se d. 34 17 Cl e. 36 80 Hg
Background image of page 2

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

View Full Document Right Arrow Icon
Which of the following are not subatomic particles? a. x-rays b. protons c. neutrons d. electrons e. All of these are subatomic particles 14. The nucleus of an atom does not contain _______. a. protons b. protons or neutrons c. neutrons d. subatomic particles e. electrons 15. Different isotopes of a particular element contain the same number of _______. a. protons b. neutrons c. protons and neutrons d. protons, neutrons, and electrons e. subatomic particles 16. In the symbol below, x = _____. x C 6 a. 19 b. 13 c. 6 d. 7 e. not enough information to determine 17. Which one of the following basic forces is so small that it has no chemical significance? a. weak nuclear force b. strong nuclear force c. electromagnetism d. gravity e. Coulomb's law 18. Gravitational forces act between objects in proportion to their a. volumes b. masses c. charges d. polarizability e. densities 19. In the periodic table, the rows are called _____ and the columns are called _____. a.
Background image of page 3
Image of page 4
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

Page2 / 6

a the plum pudding model of the atom was incorrect b most...

This preview shows document pages 2 - 4. Sign up to view the full document.

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