Write the names and symbols of the elements with the following atomic numbers: a. 1 b. 11 c. 19

Write the names and symbols of the elements with the...

Key Concepts

Periodic Table

The periodic table is a systematic arrangement of chemical elements, organized by increasing atomic number and recurring chemical properties. It serves as a critical tool for understanding the relationships and trends among elements in chemistry.

Atomic Number

The atomic number represents the number of protons found in the nucleus of an atom. It uniquely identifies an element and determines its position in the periodic table.

Element Symbol

An element symbol is a one- or two-letter abbreviation used to represent an element, facilitating simpler notation in chemical equations and discussions.

Element Name

The element name is the full, official designation of an element. It is used universally in scientific communication to refer to the element in a clear and standardized manner.

Transcript

00:03 So if you watched my last video, this one might be a little bit repetitive, but there are two things in this that you want to watch out for.

00:10 So we're asked to find symbols and names for elements that have the following atomic numbers.

00:20 And there are two things that i want you to watch out for.

00:22 One is as you're looking at your periodic table, should have a periodic table in your book if you don't have another copy.

00:29 You need to make sure that you're looking in the right place.

00:31 So for the atomic number, you should be looking in the top left corner.

00:35 Don't look at the number at the bottom.

00:37 Some versions of the periodic table will have integers in the number in the bottom.

00:41 Not all of them.

00:41 Some of them will have decimals.

00:43 If you have a decimal, it's definitely not the atomic number.

00:46 But even if there isn't a decimal, make sure that you're looking in the correct place.

00:51 It should be the number in the top left corner, not the one at the bottom.

00:55 So the second thing to watch out for is when you're writing the symbols, the if there is a two -letter symbol, the second letter always has to be lowercase.

01:08 So the example i gave last time and it's still valid is co.

01:15 So co with a lowercase o is cobalt, which is a transition metal.

01:20 It's got a blue color, which is where you get the crayon color, cobalt blue.

01:24 Co with a capital o means we've got one carbon and one oxygen, which is carbon monoxide, and it is a deadly gas.

01:32 You do not want to get those two things mixed up.

01:34 So capitalization is important.

01:37 First letter has to be capital.

01:38 If there's a second letter, it should not be capital.

01:43 So let's go ahead and start looking at some of the examples we're given.

01:46 So number one, of course, the first element has the symbol h and it is hydrogen.

01:53 The element name doesn't really matter if it is capital or not.

01:57 I'm not going to capitalize them, but if you want to, you can...