General Chemistry U04 Q1: Representing Compounds

How many valence electrons do elements in the first group (Li, Na, Fr, etc.) have?

• 3

• 1

• 11

• 6.02e23

How many valence electrons are in elements in the 17th group (halogens; F, Cl, Br, etc.)?

• 9

• 17

• 7

• 6.02e23

Valence electrons are able to be 'lost' in ionic bonds due to their weak attraction with the positive charge in the nucleus because they are found in the _ energy level.

Draw the Lewis Structure for Oxygen as an individual, neutral element.

Draw the Lewis Structure for Hydrogen Peroxide (H2O2).

Draw a Lewis Structure for C2H4O.

• * Can you think of more than one? *

What are the Molecular and Electron Geometries for ammonia (NH3)?

Is the Lewis Structure of BrF5 an accurate representation of the compound (Y/N)? Provide reasoning or evidence for your answer. (what steps do you take to draw a Lewis Structure?)

Elements found after the _ period can have expanded octets, like Bromine, which is due to the excess core electron space available that first becomes filled by elements in the D-block.

Draw the Lewis Structure for ClF5.