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Introductory Chemistry: A Foundati...

9th Edition
Steven S. Zumdahl + 1 other
ISBN: 9781337399425

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Chapter
Section
BuyFindarrow_forward

Introductory Chemistry: A Foundati...

9th Edition
Steven S. Zumdahl + 1 other
ISBN: 9781337399425
Textbook Problem

The elements that lie close to the “stair-step” line as shown below in blue are called

.

Interpretation Introduction

Interpretation:

To determine the type of elements, lie close to the stair- step line in the periodic table.

Concept Introduction:

Periodic table is arrangement of different elements with the help of columns and rows in order to characterize elements with similar properties in same groups such as alkali metals, alkaline earth metals, halides, noble gases, transition elements etc. In the periodic table, columns represent groups and rows represents periods.

Element:

An element is a simplest type of a pure substance which is composed of only one type of matter. For examples; silver, gold platinum etc.

Metal:

Metals are hard, shiny, malleable, fusible, and ductile. They are good conductor of heat and electricity. They are located to the left of the periodic table.

Metalloid:

Metalloids have properties of both metals and non-metals. They are in the middle of the periodic table.

Non-metal:

A non-metal has no lustre, with poor electrical and thermal conductivity. They are in right side of the periodic table

Valence electron: The electrons which are present in the outer most energy level is known as valence electron. Number of valence electrons can be calculated by the group number of the element. Generally, the group number is same as the valance electrons of any elements.

Explanation

Metalloid have properties of both metals and non-metals. They lie close to the stair- step line in the figure. Since, they are present in between the metals and non-metals in the periodic table, they show some of the properties of metals and some of the non-metals.

These metalloids are located along the heavy zigzag line on the periodic table. The main metalloids are found in the periodic table are as follows:

Boron (B)

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