Worksheet: Ions

In this worksheet, we will practice writing and interpreting symbols for cations and anions and calculating ion charges from proton and electron numbers.

Q1:

Which of the following does not readily form 2 + ?

  • A Z n
  • B B a
  • C H g
  • D S n
  • E R b

Q2:

What is the charge of the cation in B a O ?

  • A 1
  • B 2 +
  • C 1 +
  • D 2
  • E 4 +

Q3:

What is the charge of the cation in ( N H ) C O 4 2 3 ?

  • A 1 +
  • B 2
  • C 4 +
  • D 2 +
  • E 1

Q4:

What is the charge of the anion in S r ( H P O ) 2 4 2 ?

  • A 1 +
  • B 3
  • C 2
  • D 2 +
  • E 1

Q5:

What is the charge of the anion in N a O 2 ?

  • A 1 +
  • B 2 +
  • C 1
  • D 4
  • E 2

Q6:

Aluminum is in Group 13 of the periodic table. What is the charge of an aluminum ion?

Q7:

Magnesium is in Group 2 of the Periodic Table. What is the charge of a magnesium ion?

Q8:

Chlorine is in Group 17 of the Periodic Table. What is the charge of a chloride ion?

Q9:

F e 2 + is one of the common ions of iron. An atom of iron loses three electrons to form the other common ion of iron. What is the charge of this ion?

Q10:

Which of the following is a polyatomic ion?

  • A S O 2
  • B N O 3
  • C O 2
  • D M g 2 +
  • E F

Q11:

Atoms of beryllium commonly lose two electrons when they react. What is the charge of the beryllium ion?

Q12:

Sulfur can react to form an anion called the sulfide anion. What is the charge of the sulfide anion?

Q13:

A hydride ion ( H ) loses two electrons to form X . What is the charge of X ?

  • A 1
  • B0
  • C 3
  • D 2
  • E1+

Q14:

Which of the following best describes an ion?

  • AA positively charged nucleus with bound electrons, which is neutral overall
  • BTwo or more chemical elements bonded together
  • CAn atom which has lost or gained electrons, gaining a net positive or negative charge
  • DTwo or more distinct substances mixed together but not chemically bonded
  • EOne of over 100 unique units which can participate in a chemical reaction

Q15:

An atom of oxygen gains two electrons to form an oxide ion. What is the charge of this oxide ion?

Q16:

How does an atom form a cation?

  • ABy losing protons
  • BBy gaining protons
  • CBy losing electrons
  • DBy gaining electrons

Q17:

How does an atom form an anion?

  • ABy losing electrons
  • BBy losing protons
  • CBy gaining protons
  • DBy gaining electrons

Q18:

An atom of magnesium loses two electrons to form a magnesium ion. What is the charge of this magnesium ion?

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