Hello!
The half-life is the time of half-disintegration, it is the time in which half of the atoms of an isotope disintegrate.
We have the following data:
mo (initial mass) = 43 g
m (final mass after time T) = ? (in g)
x (number of periods elapsed) = ?
P (Half-life) = 20 minutes
T (Elapsed time for sample reduction) = 80 minutes
Let's find the number of periods elapsed (x), let us see:
Now, let's find the final mass (m) of this isotope after the elapsed time, let's see:
I Hope this helps, greetings ... DexteR! =)
Ionic bond
Explanation:
Ca - Cl₂ is an ionic bond because it involves a true metal and a non-metal.
An ionic bond is an inter-atomic bond between two chemical species.
- This bond forms between two atom with a large electronegative difference.
- Often times, this corresponds to a metal and a non-metal.
- The metal is the less electronegative specie and the non-metal is more electronegative
- The metal such as Ca loses two electrons to become positively charge ion.
- The non-metal gains the electrons. Here two atoms of Cl are turned to ions.
- Electrostatic attraction between the metal and non-metal forms the ionic bonding.
learn more;
Ionic bond brainly.com/question/6071838
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Answer:
The electrons in an atom move around the nucleus in regions known as electron shells.
Science can create new forms of energy that dont use coal for example; hydroelectricity, wind power, solar power, steam power, fusion, fission, etc.
Or science can create more efficient ways to use the resources.
