The label on a tub of margarine states that 100 g of the margarine contains 0·70 g of sodium. The sodium is present as sodium ch
1 answer:
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Answer:
cation, anion
Explanation:
Ionic bond: This type of bond is formed when there is a complete transfer of electrons from one element to another element. In this bonding one element is always a metal and another is a non-metal.
<u>The element which loses the electron and makes the positive ion is known as cation. The element which gain the electron and makes the negative ion is known as anion.</u> Both cation and anion makes the ionic bond by electrostatic attractions.
Example:-
Calcium is the element of the group 2 and period 4 which means that the valence electronic configuration is .
Chlorine is the element of the group 17 and period 3 which means that the valence electronic configuration is .
Thus, calcium loses 2 electrons to 2 atoms of chlorine and these 2 atoms of chlorine accepts each electron to form ionic bond. This is done in order that the octet of the atoms are complete and they become stable.
Thus, the formula of calcium chloride is .
Answer: Option (5) is the correct answer.
Explanation:
It is known that the ground state electronic configuration of silicon is .
And, we know that when an atom tends to gain an electron then it acquires a negative charge and when an atom tends to lose an electron then it acquires a positive charge.
As has a +4 charge which means that it has lost 4 electrons. Hence, the electronic configuration of
is
.
According to the Aufbau principle, in the ground state of an atom or ion the electrons fill atomic orbitals of the lowest energy levels first, before filling the higher energy levels.
As 2p orbital is filled after the filling of 2s orbital.
Therefore, we can conclude that 2p orbital will be occupied by the electrons of highest energy for the ground-state ion.