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ISOTOPES EASY QUESTIONS PLEASE?
The isotopes of potassium are shown below:
39 40
K K
19 19
a) Explain how the atomic structure of these isotopes are similar and how they are different.
2. The following letters represent elements. Write down two pairs of isotopes.
197 79 40 40 39 14 14 12
A B C D E F G H
79 34 19 18 19 6 7 6
1 Answer
- Dr WLv 71 decade agoFavorite Answer
they both have 19 protons
neutral atoms of both have 19 electrons
K-39 has 20 neutrons (39-19 = 20)
K-40 has 21 neutrons (40-19 = 21)
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two or more atoms are isotopes if they same number of protons and different numbers of neutrons. ie. different atomic masses.
element.. protons... neutrons..
A...... ........79...... .....197-79 = 118
B...... ........34..... ......79-34 = 45
C...... ........19..... ......40-19 = 21
D...... ........18..... ......40-18 = 22
E....... .......19..... .......39-19 = 20
F....... ........6....... ......14-6 = 8
G...... .........7...... .......14-7 = 7
H...... .........6....... .......12-6 = 6
elements C and E are isotopes.. they have the same # protons and differernt # neutrons
elements F and H are isotopes...they have the same # protons and differernt # neutrons
