Write the names and symbols for the elements with the following atomic numbers: a. 3 b. 9 c. 20

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

Key Concepts

Periodic Table

The periodic table is a systematic arrangement of chemical elements based on their atomic numbers, electron configurations, and recurring chemical properties. It helps in predicting the behaviors and characteristics of elements by organizing them into periods and groups.

Atomic Number

The atomic number of an element is the count of protons in its nucleus and determines the identity of the element. It also defines the element's position on the periodic table and influences its chemical properties.

Element Symbol

An element's symbol is a one- or two-letter abbreviation used to represent the element in equations and chemical formulas. This shorthand notation is internationally recognized and often derived from its English or Latin name.

Element Name

The element name is the full designation of the element, typically reflecting historical, cultural, or scientific origins. It is used to uniquely identify the element and is often associated with its physical and chemical properties.

Transcript

00:03 So this question is asking for the names and symbols of elements with specific atomic numbers.

00:10 And there are two traps here that i want to make sure that you avoid.

00:16 And the first has to do with making sure that you're finding the correct element.

00:20 And so, of course, you're going to need to look at a periodic table for this.

00:22 There should be one in your textbook.

00:24 If there isn't, i really like the dynamic periodic table, which you can find at www .pable .com.

00:34 But like i said, the first trap is making sure you're looking at the right number.

00:38 So you need the, you're looking at the atomic number, which should be the number in the upper left.

00:45 So it should go from 1 to 118 as you go across the table.

00:50 So there shouldn't be any decimals.

00:53 It should be an integer.

00:55 But sometimes on some versions of the periodic table, they might round the atomic weight to an integer as well.

01:02 So make sure you're not looking at the number that's at the bottom.

01:05 Make sure you're looking at the number in the top left corner.

01:08 So that's the first thing is make sure that you're getting the right one.

01:13 The second has to do with how we write the symbol.

01:16 So capitalization is important.

01:20 So let me give an example of why capitalization is important.

01:23 So co is cobalt.

01:27 It is a metal.

01:28 It's a transition metal.

01:30 Co, like this, is carbon monoxide.

01:35 Carbon monoxide is a poisonous gas.

01:37 You wouldn't want to get these two things mixed up...

Please give Ace some feedback