From the information given in the following tables, fill in...

Name: Problem 22, Chapter 5: Introductory Chemistry: An Active Learning Approach
Uploaded: 2021-04-18T13:20:33-08:00
Duration: 5 min 29 s
Channel: Evelyn Clay
Description: From the information given in the following tables, fill in as many blanks as you can without looking at any reference. If there are unfilled spaces, continue by referring to your periodic table. As a last resort, check the table of elements on the Reference Page. All atoms are neutral. (TABLE CANNOT COPY)

From the information given in the following tables, fill in as many blanks as you can without looking at any reference. If there are unfilled spaces, continue by referring to your periodic table. As a last resort, check the table of elements on the Reference Page. All atoms are neutral. (TABLE CANNOT COPY)

Key Concepts

Atomic Number

The atomic number represents the number of protons in an atom's nucleus and uniquely identifies a chemical element. In a neutral atom, it also equals the number of electrons, making it a key concept when filling in missing information about elemental properties without additional references.

Atomic Structure

Atomic structure refers to the composition of an atom, which consists of a nucleus made of protons and neutrons surrounded by electrons. This concept is essential for understanding how elements are defined, how they interact, and why atoms remain electrically neutral when the number of protons equals the number of electrons.

Periodic Table

The periodic table is a systematic arrangement of chemical elements ordered by increasing atomic number. It groups elements with similar chemical properties together, allowing one to predict element behavior and relationships based on their position within the table.

Transcript

00:01 Okay, so this question number 22 is going to be the same as number 21.

00:08 So they basically just took one question and split it up so it's not an overwhelming question to do all at once.

00:18 But if i go ahead and very quickly, i'm going to run through this one.

00:25 If you want maybe more in -depth explanation, go ahead and check out the video i made on question 21.

00:32 But let's go ahead and get right into it.

00:34 So we know that first we'll just mark down our trends because this is a new question.

00:40 We know that these will be equal.

00:42 The neutrons will be the protons plus or minus or plus maybe a little bit depending on the size.

00:48 And we know that the mass is going to be p plus plus n.

00:55 The symbol is going to be, oops, that's backwards, m over z.

01:02 And i'll use x because we don't know what symbol it will be.

01:06 That'll depend on the element.

01:08 The name will just be the name that we use to talk about things.

01:11 So let's do a little bit more of a difficult one here.

01:15 And i will say for the purposes of this one, we're going to put a 55 here, right? okay.

01:27 So if we divide that by two, for let's say the protons, neutrons are one to one.

01:36 I'll put some options here, right? so if we demand that by two and just put the extra one on the neutrons, we'll get that this is 27 and 28.

01:52 But we know that having 27 protons, so this would also imply 27 electrons.

02:04 That's one option, 27 and 28.

02:07 But it might might make more sense to move another proton, another number from the proton to the neutrons, because we might need more neutrons to balance this charge out.

02:19 And we could just write out a bunch of different options.

02:23 So let's do 26 and 29...

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