Answer:
I
Explanation:
Among the halogens given in this problem, iodine has the lowest attraction for electrons.
This property is known as electronegativity.
Electronegativity is expressed as the relative tendency with which the atoms of the element attracts valence electrons in a chemical bond.
- As you go down the periodic group the electronegativity decreases.
- The most electronegative element on the periodic table is fluorine.
- Down the group, iodine is the least electronegative
- This is due to the large size of its atom.
The answer is A, a new chemical substance has to be formed for there to be a chemical change. This is because chemical change happens when a phase of matter changes due to chemicals.
A chemical bond is the force of attraction between atoms which results fro either sharing of electrons by the involved atoms or transfer of electrons. Ionic bond (involves metal and non metals and covalent bonds ( involves non metals) are the main types of bonds. Carbon-nitrogen bond involves sharing of electrons between the two atoms forming three bonds by three pairs of electrons. Bond energy is the energy that is required to break a chemical bond therefore the strength of the bond determines the amount of bond energy that can be used to break the bond.Thus as the number of electrons pair increases in the chemical bond then the bond energy increases. Therefore, the number of electrons involved in bond formation increases then the bond energy also increases
The ionic bond is that formed between ions, a cation (positive ion) and an anion (negative ion).
Given that
is a catión it combines with anions to form an ionic compound.