For each of the following elements, use the tables on the...

For each of the following elements, use the tables on the inside cover of this book to give the chemical symbol, atomic number, and group number of each element, and to specify whether each element is a metal, nonmetal, or metalloid.
a. strontium
b. iodine
c. silicon
d. cesium
e. sulfur

Key Concepts

Periodic Table

The periodic table is a systematic arrangement of the chemical elements, organized by increasing atomic number, electron configurations, and recurring chemical properties. It serves as a fundamental tool in chemistry, allowing users to understand and predict the behavior, reactivity, and other intrinsic properties of elements based on their placement within rows (periods) and columns (groups).

Chemical Symbol

A chemical symbol is a one- or two-letter abbreviation derived from the element’s name, often based on its Latin name. These symbols provide a universal shorthand for representing elements in chemical equations and formulas, simplifying communication and study in the field of chemistry.

Atomic Number

The atomic number of an element is the number of protons found in the nucleus of an atom. It uniquely identifies an element and determines its position on the periodic table, playing a crucial role in defining the element’s chemical properties and its identity in chemical reactions.

Group Number

The group number refers to the vertical columns on the periodic table, where elements with similar valence electron configurations and chemical properties reside. This classification helps predict the reactivity, bonding characteristics, and the general behavior of the elements within the same group.

Element Classification

Element classification in chemistry involves categorizing elements as metals, nonmetals, or metalloids. This classification is based on physical and chemical properties such as conductivity, malleability, ductility, and ionization energies, which inform how elements interact with one another and their applications in various chemical processes.

Transcript

00:01 Okay, so this question is asking us basically testing our periodic table knowledge and how we can read it.

00:07 It's asking us to classify some of these following elements.

00:09 So the first one it's asking us is about strontium.

00:13 And so strontium, its chemical symbol is sr.

00:18 We're going to find it kind of low on the periodic table, but not too far.

00:21 Its atomic number is 38.

00:24 And it is in group 2.

00:30 Remember groups go left to right and periods on the periodic table are up and down.

00:34 They're horizontal.

00:35 Groups are vertical.

00:39 And it's asking us then if it is a metal, non -metal, or metalloid.

00:42 And based on where it sits, strontium is a metal.

00:47 And so what do i mean by based on where it sits? we just have to remember our periodic table is arranged in a way.

00:55 Let's kind of draw a very rough sketch of a periodic table so you can know what i'm talking about.

00:59 But our periodic table is arranged in a way that all of our non -metals, except for our first one hydrogen over here, kind of sit in this corner in like a little stair step formation.

01:16 So all of this green is our non -metals.

01:26 Our metals make up the majority of our periodic table.

01:30 And there's also like a little stair step right here...

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