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91Ó°ÊÓ

Consider an ion with the symbol X2+formed from a representative

element.

a. What is the group number of the element?

b. What is the Lewis symbol of the element?

c. If Xis in Period 3, what is the element?

d. What is the formula of the compound formed from Xand

the nitride ion?

Short Answer

Expert verified

a. Group number of the element will be 2.

b. Lewis symbol is given below.

c. The element will be magnesium.

d. The formula of the compound formed from Xand the nitride ion isX3N2.

Step by step solution

01

Part(a) Step 1: Given information

We need to find the group number of respective element.

02

Part(a) Step 2: Explanation

As the element is having 2electrons in outermost shell so the group number for the element will be 2.

03

Part(b) Step 1: Given information

We need to find the Lewis symbol for the given element.

04

Part(b) Step 2: Explanation

As it has two electrons in outermost shell so the Lewis symbol will be


05

Part(c) Step 1: Given information

We need to find the element with period number 3and group number 2.

06

Part(c) Step 2: Explanation

The element with group number 2and period3is magnesium with symbolMg2+.

07

Part(d) Step 1: Given information

We need to find the formula of the compound formed betweenXand nitride.

08

Part(d) Step 2: Explanation

Oxidation state of Xis +2

Oxidation state of nitride is -3

So the formula of compound will be X3N2.

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Most popular questions from this chapter

Which of the following pairs of elements are likely to form an ionic compound?

a. helium and oxygen

b. magnesium and chlorine

c. chlorine and bromine

d. potassium and sulfur

e. sodium and potassium

f. nitrogen and iodine

Consider the following Lewis symbols for elements X and Y:

a. What are the group numbers of X and Y?

b. Will a compound of X and Y be ionic or molecular?

c. What ions would be formed by X and Y?

d. What would be the formula of a compound of X and Y?

e. What would be the formula of a compound of X and sulfur?

f. What would be the formula of a compound of Y and chlorine?

g. Is the compound in part f ionic or molecular?

Consider the following Lewis symbols for elements X and Y:

a. What are the group numbers of X and Y?

b. Will a compound of X and Y be ionic or molecular?

c. What ions would be formed by X and Y?

d. What would be the formula of a compound of X and Y?

e. What would be the formula of a compound of X and sulfur?

f. What would be the formula of a compound of Y and chlorine?

g. Is the compound in part f ionic or molecular?

Choose the shape (1to6)that matches each of the following descriptions (a to c):
  1. linear
  2. bent (109°)
  3. trigonal planar
  4. bent (120°)
  5. trigonal pyramidal
  6. tetrahedral

(a) A molecule with a central atom that has four electron groups and four bonded atoms.

(b) A molecule with a central atom that has four electron groups and three bonded atoms

(c) A molecule with a central atom that has three electron groups and three bonded atoms

State the number of proeons and electrons in each of the following ions:

a. O2-, ased to huild hiomolecules and water

b. K+, most prevaleat positive ion in cells; needed for muscle contraction, nerve impulses

c. I-needed for thyroid function

d. Na+, most prevalent positive ion in extracellular fluidffver

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