Which kind of bond forms: ionic, covalent or metallic
Grade 10 Science Worksheet - Challenge Me
Circle the best answer, or write your answer on the line.
In MgO, oxygen's electronegativity is 3.44 and magnesium's is 1.31. Using (1 − e^(−d²/4)) × 100, what is the bond's percent ionic character, to 0.01%, Ari?
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?
Why does table salt melt only at a very high temperature, Jun?
- Weak forces between separate molecules
- Strong attractions between ions
- A sea of free electrons
Why does salt water conduct electricity when solid salt doesn't, Kira?
- Its ions are free to move
- Water makes new electrons
- Salt becomes a metal
Milo says NaCl is held together by shared electron pairs. Agree or disagree?
- Agree: Na and Cl share one pair of electrons
- Agree: bonds are shared pairs
- Disagree: an electron moves to make ions
Noah says water's O–H bonds are ionic because oxygen pulls hard. Agree or disagree?
- Agree: oxygen takes the electrons fully
- Agree: water is a salt
- Disagree: they share pairs unequally
Pia says NaCl's bond is 100% ionic. Agree or disagree?
- Agree: salt shares no electrons whatsoever
- Disagree: about 71% by Pauling's formula
- Agree: ionic means 100%
Why is 1.7 called a rule of thumb, Ren?
- It is an exact law
- Metals alone reach 1.7
- Bond type changes gradually
Which bond is more ionic, Na–Cl (2.23) or Al–O (1.83), Zee?
- They are equal
- Na–Cl
- Al–O