Lewis Dot Symbols (Simplified) - Video Tutorials & Practice Problems
On a tight schedule?
Get a 10 bullets summary of the topic
Lewis Dot Symbols represent the outer shell electrons of an element.
Lewis Dot Symbols
1
concept
Lewis Dot Symbols (Simplified) Concept 1
Video duration:
52s
Play a video:
not lewis dot symbols, sometimes referred to as electron dot diagrams, are diagrams that represent the valence electrons, often atom or ion. Now, when we talk about valence electrons, we look at it in terms of main group elements versus transition metals. Now for main group elements, the elements that are groups 1 88 a. The number of valence electrons that they possess is equal to their group number. So, for example, if we're looking at aluminum, Lewin was in Group three A. So would have three valence electrons for transition metals. It's a bit different for them. It's the number of valence. Electrons equals There s plus D electrons. So just remember, when we're looking at an element in trying to determine its number of valence electrons, you first have to look at it as being either a main group element or a transition metal
2
example
Lewis Dot Symbols (Simplified) Example 1
Video duration:
50s
Play a video:
here in states which element will possess the most valence electrons, Not one of them. I already gave away. Remember, Aluminum is in group three A. So it has three valence electrons. Now, if we look, we have sulfur, calcium, hydrogen and bro me. None of them are transition metals. So we don't have to worry about the number off S or D electrons that they possess. They're all main groove elements. So look on your periodic table and see what group do they belong to? Sulfur is in group six A. So it has six violence. Calcium is in group two ways. What has to valence? Electrons? Hydrogen is in group one A. So it has one valence electrons. And then finally bro means in group seven A. So it has seven valence electrons. So we see that, bro. Mean is the one that has the most valence electrons at seven
3
concept
Lewis Dot Symbols (Simplified) Concept 2
Video duration:
1m
Play a video:
now when it comes to drawing a lewis dot symbol, it's important to understand what is meant by element symbol versus the surrounding dots. Now, when we say element symbol that equals the nucleus of the element as well as its core electrons. When we say the surrounding dots, these equal the elements valence electrons. Now hydrogen is a little bit weird and so is helium. Both have only one shell to them. So they have their valence electrons can also be interpreted as their core electrons because that's their total number of electrons now for the other elements after them though, what we see in red represents the valence electron for that particular element. Remember for main group elements number of valence electrons is equal to group number. So you can see that lithium, sodium and potassium which are all in Group one A have one dot. And you can see that the elements in group six a oxygen, sulfur, selenium as well as the ones below them, they all have six dots. Now as always, transition metals are a little bit different. Uh they can have unexpected situations, so we tend to avoid lewis dot symbols for transition metals. We're going to focus on main group elements. So remember for main group element, the number of valence electrons is equal to their group number.
4
example
Lewis Dot Symbols (Simplified) Example 2
Video duration:
1m
Play a video:
here, it says to draw the lewis dot symbol for the following element. Here, we're dealing with delirium. So let's follow the steps. Step zero says first, we need to identify the group number of the main group element here. Tell Erie um itself is in Group six A. Next we're gonna say we're going to ignore transition metals because their electron arrangement cause unpredictable patterns. So don't worry about the transition metals. Like I said before, Step one, you're going to place one valence electron at a time on the four sides of the element, start from the top of the element and move clockwise. So we're gonna have to delirium And it's in group six a. So that means it has six valence electrons. So we're gonna start with one two, 3, 4. Remember we have to get to six, so we're still missing two more five six. We follow Step two words has continue adding electrons, pairing them up until you reach the appropriate number of valence electrons here, we need to get to six valence electrons, which is what we just did. So this year represents the lewis dot symbol for Hillary. Um
5
Problem
Problem
Draw the Lewis Dot symbol for the following element:Sr
A
B
C
D
6
Problem
Problem
Draw the Lewis Dot symbol for the following element:Pb
A
B
C
D
7
Problem
Problem
Draw the electron-dot symbol for the following element:Rn
A
B
C
D
Do you want more practice?
We have more practice problems on Lewis Dot Symbols (Simplified)
Additional resources for Lewis Dot Symbols (Simplified)
