| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.39 |
| Score | 0% | 68% |
Elements in the Periodic Table of the Elements are ordered by which of the following?
atomic mass |
|
atomic weight |
|
atomic number |
|
number of electron shells |
The Periodic Table of the Elements categorizes elements primarily by the number of protons in their nucleus (atomic number) and secondarily by the characteristics they exhibit.
Which of the following substances gives up positively charged hydrogen ions (H+) when dissolved in water?
solution |
|
acid |
|
base |
|
alkaline |
An acid is a substance that gives up positively charged hydrogen ions (H+) when dissolved in water. A base (alkaline) gives up negatively charged hydroxide ions (OH-) when dissolved in water. pH is a scale that measures of how basic or acidic a solution is. Numbered from 0 to 14, solutions with a pH of 7 are neutral, less than 7 are acidic, more than 7 are alkaline.
In cell biology, where does DNA replication take place?
nucleus |
|
Golgi apparatus |
|
mitochondria |
|
cytoplasm |
The cell nucleus contains the genetic material of the cell and is where DNA replication takes place.
A subatomic particle found in the nucleus of an atom. It carries a positive electric charge. This desribes which of the following?
electron |
|
neutron |
|
atom |
|
proton |
A proton is a subatomic particle found in the nucleus of an atom. It carries a positive electric charge.
The energy posessed by a ball on the window ledge of a tall building is an example of what kind of energy?
gravitational |
|
potential |
|
inherent |
|
kinetic |
Kinetic energy is the energy posessed by a moving object. Potential energy is stored energy in a stationary object based on its location, position, shape, or state.