CHEMICAL BONDING

Front

Lewis Dot Symbol

Back

the number of valence electrons in an element

Front

What do the dots in a Lewis dot structure represent?

Back

Valence electrons.

Answer explanation

Valence electrons are the electrons in the valence shell of an atom. The valence shell of an atom is made up of the atomic orbitals in the highest principal energy level of the atom.

When we draw the Lewis dot structure for an atom, we first write down the element symbol for the atom. Then, we draw dots around the element symbol. The number of dots we draw is equal to the number of valence electrons in the atom.

Front

According to the Octet Rule, atoms want ____ electrons in their outermost energy level or shell.

Back

8

Front

How do atoms complete the octet rule?

Back

They lose or gain electrons in the outermost level

Front

X atom has the electronic configuration of 1s² 2s² 2p³. How many electrons should X atom have around its Lewis dot model?

Back

5

Front

Lewis electron-dot diagram for an S^2- ion?

Back

Front

According to the Octet Rule, atoms of elements react with each other in order to attain ____ electrons in their outermost energy level or shell.

Back

8

Front

By replacing the element symbol, this could be a diagram of which element? Li, Al, C, Be

Back

Al

Front

Identify element for X atom: Ne, C, Al, Be

Back

C

Front

An atom in the ground state contains a total of 5 electrons, 5 protons, and 5 neutrons. Which Lewis dot diagram represents this atom?

Back