Predict ion charges from the periodic table
9th grade (Year 10 in England) · 16 questions · Common Core: NGSS.HS-PS1-1, NGSS.HS-PS1-2 · England: GCSE Combined Science: Bonding, structure and the properties of matter
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Date
Score/ 16
Question 1
Fluorine (F) is in group 17 (7). What charge does its ion have?
- A. 1−
- B. 3+
- C. 1+
- D. 3−
Question 2
Why does solid sodium chloride not conduct electricity, but molten sodium chloride does?
- A. Melting creates electrons
- B. In the liquid the ions are free to move and carry charge
- C. The solid has no ions
- D. Heat conducts electricity
Question 3
An atom of sulfur (atomic number 16) forms its usual ion (charge 2−). How many electrons does the ion have?
Answer
Question 4
Lithium (Li) is in group 1. What charge does its ion have?
- A. 3−
- B. 2−
- C. 1+
- D. 2+
Question 5
Why does magnesium oxide have a much higher melting point than sodium chloride?
- A. Magnesium oxide is covalent
- B. Oxygen is a gas
- C. Mg²⁺ and O²⁻ have larger charges, so the ionic bonds are stronger
- D. Sodium chloride has no bonds
Question 6
An atom of magnesium (atomic number 12) forms its usual ion (charge 2+). How many electrons does the ion have?
Answer
Question 7
Aluminium (Al) is in group 13 (3). What charge does its ion have?
- A. 3+
- B. 3−
- C. 2−
- D. 2+
Question 8
Why do sodium and chloride ions both end up with the electron arrangement 2,8?
- A. Sodium loses one electron and chlorine gains one, both reaching a full outer shell
- B. Sodium gains seven electrons
- C. They share electrons
- D. They both gain electrons
Question 9
An atom of oxygen (atomic number 8) forms its usual ion (charge 2−). How many electrons does the ion have?
Answer
Question 10
Calcium (Ca) is in group 2. What charge does its ion have?
- A. 1+
- B. 3+
- C. 2+
- D. 3−
Question 11
Why does solid sodium chloride not conduct electricity, but molten sodium chloride does?
- A. The solid has no ions
- B. Melting creates electrons
- C. Heat conducts electricity
- D. In the liquid the ions are free to move and carry charge
Question 12
An atom of phosphorus (atomic number 15) forms its usual ion (charge 3−). How many electrons does the ion have?
Answer
Question 13
Lithium (Li) is in group 1. What charge does its ion have?
- A. 2−
- B. 1+
- C. 1−
- D. 3−
Question 14
Why do sodium and chloride ions both end up with the electron arrangement 2,8?
- A. They share electrons
- B. Sodium loses one electron and chlorine gains one, both reaching a full outer shell
- C. Sodium gains seven electrons
- D. They both gain electrons
Question 15
An atom of oxygen (atomic number 8) forms its usual ion (charge 2−). How many electrons does the ion have?
Answer
Question 16
Oxygen (O) is in group 16 (6). What charge does its ion have?
- A. 3+
- B. 2−
- C. 1+
- D. 2+
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