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An Element Belongs to the Third Period and Group Iiia (13) of the Periodic Table. State: If It is a Metal Or Non-metal?

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Question

An element belongs to the third period and Group IIIA (13) of the periodic table. State: if it is a metal or non-metal?

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Solution

It's a Metal.

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Chapter 5: The Periodic Table - Exercise 5 (C) [Page 94]

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Selina Concise Chemistry [English] Class 9 ICSE
Chapter 5 The Periodic Table
Exercise 5 (C) | Q 2.3 | Page 94

RELATED QUESTIONS

Calcium is an element with atomic number 20. Stating reason, answer each of the following questions:-

(i) Is calcium a metal or a non-metal?

(ii) Will its atomic radius be larger or smaller than that of potassium with atomic number 19?

(iii) Write the formula of its oxide.


The electronic configuration of the atom of an element X is 2, 8, 4. In modern periodic table, the element is places in :

(a) 2nd group
(b) 4th group
(c) 14th group
(d) 8th group


State the trends in physical properties on moving down the group. Give an example to illustrate.


An element X belong to 4th period and 17th group, state.

name the family to which it belong.


In the following table, the positions of six elements A, B, C, D, E and F are given as they are in the Modern Periodic Table :

1 2 3-12 13 14 15 16 17 18
2 A     B   C     D
3         E       F


On the basis of the above table, answer the following questions :
(i) Name the element which forms only covalent compounds.
(ii) Name the element which is a metal with valency three.
(iii) Name the element which is a non-metal with valency three.
(iv) Out of B and C, whose atomic radius is bigger and why ?
(v) Write the common name for the family to which the elements D and F belong.


Fill in the blank 
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(a) Decreases
(b) Increases
(c) Remains the same
(d) Depends on the period
(ii) The electro negativity
(a) Depends on the number of valence electrons
(b) Remains the same
(c) Decreases
(d) Increases
(iii) The ionization potential
(a) Goes up and down
(b) Decreases
(c) Increases
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(b) Increases
(c) Remains the same
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(a) Goes up and down
(b) Decreases and then increases
(c) Increases
(d) decreases


The following questions refer to the Periodic Table.
What is the common feature of the electronic configurations of the elements in group 7?


An  element Z has atomic number 16. Answer the following
(a) State the period and group to which Z belongs
(b) Is Z a metal or a non-metal?
(c) State the formula between Z and hydrogen. 
(d) what kind of a compund is this?


Fill in the blanks from the words A to F given below’.

A: Decreases
B: Increases
C: Remains same
D: Increases by one
E: Electropositive
F: Electronegative

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