How do you draw out a lewis dot structure, bf3 for example

First let's remember how to draw lewis dot structure in general

In the lewis dot structure model the points represent the valence electrons that each element has, these electrons are the ones that are shared to form a bond.

For the element to be stable it must comply with the octet rule (each element must be surrounded by 8 electrons to be stable) But there are exceptions to this rule from elements that are stable with fewer electrons (Be, B, Al) and others that they can expand the layer and are stable with more than eight (S)

In this case our compound () one of the elements that form it is B, which does not comply with the octet rule.

electronic boron configuration

Boron´s valence electrons: 3

Electronic configuration of fluorine.

Fluorine´s valence electrons: 7

its valence electrons are distributed to each atom

Boron shares an electron with each fluorine so the fluorine can reach the octet

Since boron is an exception, it is stable with 6 electrons

i just learnt this recently but i need to look through my notes again

most historians agree that gabriel mouton, the vicar of st. paul’s church in lyons, france, is the “founding father” of the metric system. he proposed a decimal system of measurement in 1670. mouton based it on the length of one minute of arc of a great circle of the earth (now called a nautical mile, 1852 meters). he also proposed the swing-length of a pendulum with a frequency of one beat per second as the unit of length (about 25 cm). a pendulum beating with this length would have been fairly easy to produce, thus facilitating the widespread distribution of uniform standards. over the years, his work was revised, improved, and extended by a number of french scientists.

the political sponsor of weights and measures reform in the french revolutionary national assembly was the bishop of autun, better known as talleyrand. under his auspices, the french academy appointed several committees to carry out the work of developing a usable system of weights and measures for france. one of the committees recommended a decimalized measurement system based upon a length equal to one ten-millionth of the length of a quadrant of the earth’s meridian (i.e., one ten-millionth of the distance between the equator and the north pole).