 |
1 | |
Atoms are made of |
| | A) | protons only |
| | B) | neutrons only |
| | C) | electrons only |
| | D) | a, b and c |
| | E) | a and b only |
|
|
2 | |
Every atom of the same element has |
| | A) | the same mass |
| | B) | the same atomic number |
| | C) | the same number of neutrons |
| | D) | the same weight |
|
|
3 | |
Water at 293 F is what? |
| | A) | solid |
| | B) | liquid |
| | C) | gas |
| | D) | plasma |
|
|
4 | |
Identify this element:  <![CDATA[<a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=gif::::/sites/dl/free/0072920033/80712/39x.gif','popWin', 'width=76,height=96,resizable,scrollbars');" href="#"><img valign="absmiddle" height="16" width="16" border="0" src="/olcweb/styles/shared/linkicons/image.gif"> (0.0K)</a>]]> |
| | A) | Cs |
| | B) | Ba |
| | C) | Xe |
| | D) | As |
| | E) | B |
|
|
5 | |
How many protons and neutrons are in this element: 195Pt? |
| | A) | 78 protons, 117 neutrons |
| | B) | 117 protons, 78 neutrons |
| | C) | 78 protons, 195 neutrons |
| | D) | 195 protons, 78 neutrons |
| | E) | 195 protons, 117 neutrons |
|
|
6 | |
Which of the following is not true of light? |
| | A) | it is the visible form of electromagnetic radiation |
| | B) | it can be absorbed by chemicals, causing electrons to jump to higher energy levels |
| | C) | it is a form of energy |
| | D) | the visible region of light includes wavelengths from 300 nm to 900 nm. |
|
|
7 | |
The ground state of an atom is considered |
| | A) | an atom that is has only one electron in its closest shell. |
| | B) | to be the energy an atom has at 0 K. |
| | C) | the highest energy of an electron. |
| | D) | an atom that is not bonded to any other elements. |
| | E) | the lowest energy of an atom. |
|
|
8 | |
The freezing point of methane is -295 oF and the boiling point is -263 oF. The temperature of the surface of Titan, a moon of Saturn, is 93 K. If methane exists on Titan, it is |
| | A) | a gas. |
| | B) | a solid. |
| | C) | a liquid. |
| | D) | a plasma. |
| | E) | none of these |
|
|
9 | |
Rutherford's experiment with alpha particle scattering by gold foil established that: |
| | A) | electrons have a negative charge. |
| | B) | protons are 1840 times heavier than electrons |
| | C) | protons are not evenly distributed throughout an atom. |
| | D) | atoms are made of protons, neutrons and electrons. |
| | E) | the nucleus contains protons and neutrons. |
|
|
10 | |
How many protons and electrons are present in a Ca2+ ion? |
| | A) | 18 protons, 20 electrons |
| | B) | 20 protons, 18 electrons |
| | C) | 20 protons, 21 electrons |
| | D) | 20 protons, 19 electrons |
| | E) | 22 protons, 20 electrons |
|