1.
|
Complete this table:
| Symbol |
p+1 |
no |
e-1 |
|
Symbol |
p+1 |
no |
e-1 |
| 11H |
|
|
|
|
178O |
|
|
|
| 21H |
|
|
|
|
3919K |
|
|
|
| 42He |
|
|
|
|
4019K |
|
|
|
| 52He |
|
|
|
|
23592U |
|
|
|
| 63Li |
|
|
|
|
23992U |
|
|
|
| 73Li |
|
|
|
|
23993Np |
|
|
|
| 168O |
|
|
|
|
23994Pu |
|
|
|
|
|
You'll need a copy of a periodic table for the following questions. |
| 2. |
Give the numbers of neutrons, protons, and electrons in the atoms
of each of the following isotopes |
|
(a) radium-226
|
|
(b) carbon-14
|
|
(c) cesium-137
|
|
(d) iodine-131
|
| 3. |
Write the symbol for the isotope of plutonium (Pu) with 146 neutrons.
The atomic number of plutonium is 94.
|
| 4. |
Write the symbols of the isotopes that contain the following. |
|
(a) An isotope of silver whose atoms have 63 neutrons.
|
|
(b) An isotope of strontium whose atoms have 52 neutrons.
|
|
(c) An isotope of lead whose atoms have 126 neutrons.
|
|
(d) An isotope of fluorine whose atoms have 9 neutrons. |