Question 1. In the following equation for the alpha decay of bismuth-214, supply the missing element that correctly completes th
e equation.
Question 2. Complete the following equations by correctly matching the appropriate product.
Question 2. Complete the following equations by correctly matching the appropriate product.
2 answers:
Answer: a) Tl (Thallium)
b)
Explanation:
Alpha decay : When a larger nuclei decays into smaller nuclei by releasing alpha particle. In this process, the mass number and atomic number is reduced by 4 and 2 units respectively.
General representation of an element is given as:
where,
Z represents Atomic number
A represents Mass number
X represents the symbol of an element
Total mass on reactant side = total mass on product side
214= A + 4 , A = 210
To calculate Z:
Total atomic number on reactant side = total atomic number on product side
83= Z + 2, Z = 81
b)
1.
Total mass on reactant side = total mass on product side
210= A + 4 , A = 206
To calculate Z:
Total atomic number on reactant side = total atomic number on product side
84= Z + 2, Z = 82
2.
Total mass on reactant side = total mass on product side
218= A + 4 , A = 214
To calculate Z:
Total atomic number on reactant side = total atomic number on product side
84= Z + 2, Z = 82
3.
Total mass on reactant side = total mass on product side
214= A + 4 , A = 210
To calculate Z:
Total atomic number on reactant side = total atomic number on product side
84= Z + 2, Z = 82
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Answer:
See answer below
Explanation:
First, let's explain what a Lewis structure is.
A lewis structure in short words is a draw of an atom or molecule showing how the electrons bond with another electrons of atoms, and also shows the unshared pair of electrons, which are the electrons that do not bond in the molecule. In the case of an atom, it shows all the available electrons it has to be shared and bonded with another atom to form a molecule.
With this said, in order to draw the lewis structure we need to know how many electrons the atoms involved have. To know this, we need to write the electronic configuration of the atoms, based on it's atomic number.
In the case of Hydrogen (Z = 1), Carbon (Z = 6) and Cl (Z = 17):
[H] = 1s¹ 1 electron available.
[C] = 1s² 2s² 2p² In this case, we have 4 electrons.
[Cl] = 1s² 2s² 2p⁶ 3s² 3p⁵ In this case, 7 electrons.
Now that we have the configuration, and the available electrons, we need to draw the atoms. The Carbon is the more electronegative atom of them, so, the bonding will be formed based on this atom as the central. So the other atoms will just bond and shared a pair of electron with the carbon. The HCCl₃ can be treated as CH₄, with a tetrahedrical form.
The picture below shows the lewis structure.
Hope this helps
