Grade 10 · Science · Chemistry

10th grade Which kind of bond forms: ionic, covalent or metallic worksheet

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Which kind of bond forms: ionic, covalent or metallic

Grade 10 Science Worksheet - Challenge Me

NameDate

Circle the best answer, or write your answer on the line.

In CaCl₂, chlorine's electronegativity is 3.16 and calcium's is 1. Using (1 − e^(−d²/4)) × 100, what is the bond's percent ionic character, to 0.01%, Bo?
In Al₂O₃, oxygen's electronegativity is 3.44 and aluminum's is 1.61. Using (1 − e^(−d²/4)) × 100, what is the bond's percent ionic character, to 0.01%, Esme?
3.
Why does table salt melt only at a very high temperature, Jun?
- Strong attractions between ions
- A sea of free electrons
- Weak forces between separate molecules
4.
Why is CO₂ a gas at room temperature while NaCl is a solid, Luz?
- CO₂ is separate molecules
- CO₂ is made of ions
- CO₂ has a sea of electrons
5.
Milo says NaCl is held together by shared electron pairs. Agree or disagree?
- Agree: bonds are shared pairs
- Agree: Na and Cl share one pair of electrons
- Disagree: an electron moves to make ions
6.
Noah says water's O–H bonds are ionic because oxygen pulls hard. Agree or disagree?
- Agree: water is a salt
- Disagree: they share pairs unequally
- Agree: oxygen takes the electrons fully
7.
Pia says NaCl's bond is 100% ionic. Agree or disagree?
- Disagree: about 71% by Pauling's formula
- Agree: salt shares no electrons whatsoever
- Agree: ionic means 100%
8.
Why is 1.7 called a rule of thumb, Ren?
- It is an exact law
- Bond type changes gradually
- Metals alone reach 1.7
9.
Al₂O₃'s difference is 1.83, just above 1.7. How is it best described, Tala?
- Metallic
- Purely covalent
- Ionic, with some covalent character
10.
Which bond is more ionic, Na–Cl (2.23) or Al–O (1.83), Zee?
- Al–O
- Na–Cl
- They are equal

10th grade Which kind of bond forms: ionic, covalent or metallic worksheet – printable — Print: 1 2 3 4 5 6

About this worksheet

Which kind of bond forms: ionic, covalent or metallic. Every version has 10 questions, and the answer key prints on the second page.

What your child will learn

I can tell ionic (electrons moved), covalent (shared) and metallic (pooled) bonds apart.
I can use the Pauling electronegativity difference: above about 1.7 ionic, 0.4–1.7 polar covalent, below 0.4 nonpolar (a rule of thumb).
I can find percent ionic character with Pauling's formula, 1 − e^(−d²/4).
I can explain properties from bond type: melting points, conduction, states.

Standard: supports HS-PS1-1

Words to know

ionic bond: Attraction between ions made by moving electrons

covalent bond: A shared pair of electrons between atoms

polar covalent: Shared unequally, toward the more electronegative atom

metallic bond: Positive ions held in a sea of pooled electrons

ionic character: How ionic a bond is, from its electronegativity difference

Common mistakes

Your child added the two electronegativities. The bond depends on the difference: subtract the smaller from the larger.

Your child didn't square the difference. Pauling's formula is 1 − e^(−d²/4), with the difference squared.

Your child mixed up ionic and covalent. Ionic bonds move electrons to make ions; covalent bonds share them.

Questions parents ask

What is the most common mistake with which kind of bond forms: ionic, covalent or metallic?

Your child added the two electronegativities. The bond depends on the difference: subtract the smaller from the larger.

Are these 10th grade science worksheets free to print?

Yes. All 6 printable versions at each level are free to print, with the answer key, and no account is needed.

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