Question

Question 13 (6 points)
Which of the following is true about naming Ionic compounds? Multi select 3

a
If the cation is a d-block element, then its oxidation state is Witten after the element name inside parenthesis as 1,2,3 and so on.
b
the names of Polyatomic ions stay un changed in the name
c
prefixes are used to indicate number of atoms of each element present
d
the name of the element or polyatomic ion forming the cation is written first
e
if the anion is monoatomic, then the name ends with an -ide ending
Question 14 (3 points)
Which of the foolwing is FALSE about Ionic compounds?

a
when an ionic lattice is broken, the atoms remain ionized ( stay as ions)
b
when Ionic compounds dissolve in water they form electrolytes if the solution conducts electricity
c
ionic compounds are brittle
d
Lattice energy is the energy needed to break one mole of ionic bonds
e
Ionic compounds form lattice like structures because of electrostatic attractions to neighboring ions with opposite charges.

Answer 1

Question 13 — choose three true statements:
b, d, e

- b: True — names of common polyatomic ions remain unchanged in compound names (e.g., sulfate, nitrate).
- d: True — the cation (element or polyatomic ion) is named first.
- e: True — a monoatomic anion gets the -ide ending (e.g., chloride, oxide).

(Note: (a) is misleading — only transition metals with variable charges require the oxidation state in parentheses; (c) is false — prefixes are used for covalent molecular compounds, not ionic ones.)

Question 14 — which is FALSE:
d

- d is false as stated: lattice energy is usually defined as the energy change when gaseous ions form the solid lattice (energy released) — or equivalently the energy required to separate one mole of the solid into gaseous ions. The phrasing “energy needed to break one mole of ionic bonds” is imprecise/misleading. The other statements are correct.