# Frequent question: How many electrons does each line indicate are shared?

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Each bond includes a sharing of electrons between atoms. Two electrons are shared in a single bond; four electrons are shared in a double bond; and six electrons are shared in a triple bond.

## How do you know how many electrons are shared?

S = N – A. S = shared electrons : total number of electrons that will be shared and therefore are the bonding electrons. Divide “S” by 2 and you’ll have the number of bonds (lines) in the structure. N = needed electrons : needed is based on the octet rule which is 8 electrons for all atoms except hydrogen which is 2.

## Does a line represent two electrons being shared?

The line is just used for bonds between atoms, also representing 2 electrons. The line representing a bond between two atoms shows the sharing of two electrons between the atoms.

## How many electrons are shared between CC?

Each carbon atom has 4 valence electrons. In acetylene, there are 3 carbon-carbon bonds, i.e. 6 electrons shared between the carbons. And in ethylene there are 4 electrons shared between the carbon atoms; the remaining 2 electrons constitute half of the C−H bonds.

## What do dots mean in Lewis structure?

A Lewis Structure is a very simplified representation of the valence shell electrons in a molecule. It is used to show how the electrons are arranged around individual atoms in a molecule. Electrons are shown as “dots” or for bonding electrons as a line between the two atoms.

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## What is the Lewis symbol of fluorine?

Lewis symbol

Name Atomic number Valence electrons
Carbon (C) 6 4
Nitrogen (N) 7 5
Oxygen (O) 8 6
Fluorine (F) 9 7

## What symbol is used to represent 2 shared electrons?

The Lewis formalism used for the H2 molecule is H:H or H—H. The former, known as a ‘Lewis dot diagram,’ indicates a pair of shared electrons between the atomic symbols, while the latter, known as a ‘Lewis structure,’ uses a dash to indicate the pair of shared electrons that form a covalent bond.