bonding and physical properties

• what is the element in period 3 with the highest electronegativity value?

  chlorine
• what is the strongest type of interaction between hydroxide peroxide and water?

  hydrogen bonding
• explain why CF4 has a bond angle of 109.5

  around carbon there are 4 bonding pairs and 0 lone electron pairs
• if a molecule has 3 bonding electron pairs and 1 lone electron pair, what is its shape?

  triangular pyramid
• what bond angle is a triangular pyramid?

  107 degrees
• how many bond pairs does a tetrahedral have?

  4
• how many lone electron pairs does a tetrahedral have?

  0
• what is the bond angle of a tetrahedral?

  109.5 degrees
• how many bond pairs and lone electron pairs does a trigonal bipyramid have?

  5 bond pairs and 0 lone electron pairs.
• what is the bond angle of a trigonal bipyramid?

  90 degrees and 120 degrees
• how many bond pairs and lone electron pairs does an octahedral have?

  6 bond pairs and 0 lone electron pairs.
• define the term electronegativity

  the power of an atom to attract negative charge towards itself within a covalent bond
• how does a polar bond form?

  if the two atoms that are bonded have different electronegativity values.
• if a molecule has more than 1 lone pair and 2 bond pairs what shape is it?

  Bent/ v shaped
• what is a v shaped molecules bond angle?

  104.5 degrees
• what is a trigonal planar bond angle?

  120 degrees
• what shape molecule has 3 bonding pairs and 0 lone electron pairs?

  Trigonal planar
• why is HOH molecule bent but HBeH is linear?

  the placement of the two sets of unpaired electrons in water forces the bond to assume tetrahedral arrangement.

  the resulting HOH molecule is bent

  the HBeH molecule must have the electron pairs as far away from one another as possible and is therefore linear.
• how is a covalent bond formed?

  Sharing of electrons.