Identify each of the following elements as a metal, a...

Identify each of the following elements as a metal, a nonmetal or a metalloid.
a. Lithium
b. Phosphorous
c. Element used in coins, jewelry
d. Element which is a poor conductor of electricity and heat
e. Silicon
f. Hydrogen
g. Strontium
h. Cesium

Key Concepts

Metalloids

Metalloids are elements that display intermediate properties between metals and nonmetals. They may exhibit semiconductor behavior, meaning their electrical conductivity can be modified under certain conditions. Found along a diagonal band on the periodic table, metalloids are crucial in applications like electronics due to their versatile characteristics.

Nonmetals

Nonmetals comprise elements that usually exhibit poor conductivity of heat and electricity. They are often found on the right side of the periodic table and can exist in various states (gases, liquids, or brittle solids) under standard conditions. Their chemical properties generally involve gaining or sharing electrons during reactions.

Periodic Table Classification

The periodic table categorizes elements based on their chemical and physical properties, grouping them into metals, nonmetals, and metalloids. This classification helps predict element behaviors and interactions by associating them with shared characteristics, such as conductivity and malleability.

Metals

Metals are elements typically characterized by high electrical and thermal conductivity, malleability, ductility, and a shiny appearance. They are generally located on the left and center portions of the periodic table and tend to lose electrons to form positive ions in chemical reactions.

Transcript

00:01 So we are going to be identifying different types of elements as either metals, non -metals, or metalloids.

00:10 So if we look at the periodic table of elements, which i have here, we see it could basically be divided, as i said, into metals and non -metals.

00:22 And we see that there's kind of like this green diagonal line that goes here, right? so almost everything to the left of this line would be considered a metal, with the exception of something like hydrogen over here.

00:43 And everything to the right of this diagonal would be considered a non -metal.

00:54 Just write that there, non -metal.

00:57 This would also include our hydrogen over here.

01:00 Just remember because it's in ascending order, it was placed in that direction.

01:04 Of atomic number and because it has properties that are smaller to its.

01:10 So we also see that this diagonal here that's outlined in green, that would represent our metalloids.

01:21 I just write that in here.

01:23 Metaloids.

01:25 Yeah.

01:29 Now let me write that again.

01:33 Okay.

01:34 So this would be our metalloids over here.