Test 2

Question 1

What what is the physical structure of ionic compounds

Answer 1

Iona compounds consist of a large number of positive negative highlights in a racial determinant by the number of electrons transfers from metals to nonmetals. These ions are arranged in a compact alternate pattern

Question 2

Where is I ionic bond

Answer 2

A bind between a medal and non metal

Question 3

Why is this a covalent bond

Answer 3

Between non medals

Question 4

How are ionic compounds aranged

Answer 4

In an alternat3d pattern where all sides of a molecule are surrounded by 6 other molecules

Question 5

What is a crystal lattice

Answer 5

3 dimensional geometric arrangement of particles.

Question 6

Explain the shape of ionic crystals

Answer 6

The strong attraction between positive ionic and negative ions in an ionic compounds makes a crystal lattice. The negative are souranded by postive and vis versa

Question 7

Name 3 physical properties 9f an ionic solid.

Answer 7

Hardness - ions are in a fix position because of strong attraction forces, keeping it a solid
Melting point- the attraction forces weakens and ions move freely, resulting in a liquid
Boiling point - turns into a boiling liquid as ions rapidly move

Question 8

Why are ionic compounds not conductive when in a solid state

Answer 8

Because of who the ions are fixed to, one position does not allow to conduct electricity, unlike in a liquid where they freely move

Question 9

What is a electrolyte

Answer 9

An ionic compound that when in a liquid state can conduct eletric currents.

Question 10

Organized electrons in metallic solids

Answer 10

Metallics solids consist of positive metal ions (metal cations) surrounded by a sea of mobile electrons. The outer level of electrons moves freely ( delocalized electrons) to neighboring atoms because metal atoms do not share valent electrons.

Question 11

What are Metallic solids

Answer 11

solids made of metal atoms held together by metallic bonds

Question 12

Explain metal lattice

Answer 12

Mental lattice are held together by the attraction between metal cations and the sea of electrions

Question 13

What are the similarities between ionic bonds and metallic bonds

Answer 13

Both bonds are based on the attraction of particles, negative + positive. And create lattice structures

Question 14

What are the properties of metal

Answer 14

Melting/Boiling - metals have relatively high melting and boiling points because of mobile caches and electrons

Malleability, ductility, durability - mobile particles involved in metallic ponte can be pushed or pulled past each other.Metal is durable because metallic cautions are strongly attracted

Thermal conduction and electrical conductivity - metals are conductors because of the mobile electrons around the positive metal cachens

Hardness and strength - as the number of delocalized electrons increases, so does the properties of hardness and strength

Question 15

What is a alloy

Answer 15

An alloy is a mixture of elements that has metallic properties, examples are stainless steel, brass and cast iron

Question 16

What are substitutional alloys

Answer 16

When sum of the atoms in the original metallic solid is replaced by other metals of a similar atomic size

Question 17

What are interstitial alloys

Answer 17

Instead of replacing, smaller metallic solids spill in the holes of metallic crystals

Question 18

Explain the difference of molecular solids and molecular network solids

Answer 18

Network solids are composed only of atoms interconnected by network of collar and bonds. Molecular solids are held together by dispersion forces, dipole forces and hydrogen bonds

Question 19

Where are the three physical properties of collar molecular compound

Answer 19

Covail, molecular compounds have low mounting points, boiling points and can exist as vapor at room temp. This is all due to weak intermolecule.Forces

Question 20

There’s three physical properties of colorant network solids

Answer 20

ConvertNequid solids are brittle extremely hard and do not conduct heat or electricity. This is due to tetrahedral atom arrangement, which form a strongly bonded crystal system

Question 21

Why are network solids used in cutting tools

Answer 21

Network solids are used for cutting tools because of their extreme hardness.

Question 22

How is the crystal latis in a covert molecule different from the crystal?Latis in an ionic solid

Answer 22

They have less attraction between molecules

Question 23

What are intermolecular forces

Answer 23

the attractive and repulsive forces that arise between the molecules of a substance

Question 24

What type of substance have dipersian force

Answer 24

All molecules have electrons. Therefore, all particles can have dipersian forces.However, it is more significant in molecules with no polar

Question 25

Explain dipersian forces

Answer 25

Electron clouds are in constant motion.When two molecules are in close contact, the electron cloud of one molecule repils, the other molecule. The electron density around each unique Luis. 41 moment is greater, then one region of the cloud. This causes each molecule to form a temporary dyepole. When temporary dipoles are close together, a weak dispersion force exists between the dipols

Question 26

What type of substances have dipole dipole forces

Answer 26

Polar molecules

Question 27

Explain dipole dipole forces

Answer 27

Dipol forces of curb between polar molecules, the slightly negative region, and positive region create an attraction between each other that will cause neighboring polar molecules to orientate themselves, so opposite charges align

Question 28

What is the relative strength of dipole forces

Answer 28

Dipo forces are greater than dispersion forces, but weaker than hydrogen bonds

Question 29

What type of substances have hydrogen bonds

Answer 29

Molecules containing a hydrogen atom bonded to a small, highly electronegative atom with at least one lone pair, fluoride nitrogen and oxygen

Question 30

How is a hydrogen bond made

Answer 30

To form a hydrogen bond , hydrogen needs a dipole attraction with either an oxygen nitrogen or fluoride. That's because the electronegativity of them is enough to make a large partial positive charge on the hydrogen and small enough for hydrogen to be close to the lone pair.

Question 31

What is the relative strength of a hydrogen bond

Answer 31

It is the strongest intermolecular force, and that is because the bonds between the hydrogen and other substance is so polar