A-Level Chemistry Electronegativity and Bond Polarity

1. Relative atomic mass

2. Electronegativity

3. Reactivity

1. Electron density is a property unique to metals.

2. Electron density relates to the probability of finding electrons at a particular position in space.

3. At positions with high electron densities, electrons are less likely to be found.

4. It can be imagined as a cloud of electrons around the nucleus.

1. non-polar, because the H-O bond is non-polar.

2. polar, because H-O bond is polar and the molecule has a non-symmetrical shape.

3. polar, because H-O bond is polar and there are two H-O bonds in a water molecule.

1. A dipole

2. An ion

3. An isotope

1. sparsely, polarised

2. broken, polarised

3. perfectly, non-polarised

4. perfectly, polarised

1. Linear

2. Non-linear

3. Trigonal pyramidal

4. Trigonal planar

5. Tetrahedral

1. True

2. False

3. The two are unrelated.

1. True

2. False

1. Non-linear

2. Trigonal pyramidal

3. Tetrahedral

4. Linear

1. non-polar, because C-O bond is non-polar.

2. polar, because C-O bond is polar and the molecule has a non-symmetrical shape.

3. polar, because C-O bond is polar and there are two C-O bonds in a Carbon dioxide molecule.

4. non-polar, because C-O bond is polar, but the molecule is symmetrical in shape.