physical science yas

Besides being valuable, silver is special because it can be stretched into a thin wire, this property is called what?

ductility

What diatomic molecule is joined by a triple covalent bond?

N₂

What is a molecule made up of two atoms of the same element?

diatomic molecule

Which element, when combined with potassium, would most likely form an ionic compound?

fluorine

What characteristic of metals makes them good electrical conductors?

They have mobile valence electrons

Covalent bonds would most likely form between what?

two non metals

Groups of atoms, such as CO or SO2, held together by covalent bonds are called what?

molecules

Why can metals bend without breaking?

Metals contain constantly moving or delocalized electrons

Besides being valuable, gold is special because it can be hammered into a very thin foil, this property is called what?

malleability

What about about metals is true?

Electrons in a metal lattice are free to move

Covalent bonds would most likely form between what?

carbon and nitrogen

What type of substance would most likely make the best tank round if it has to be malleable to penetrate multiple layers of medium armor?

metallic 

In a crystal of an ionic compound, each cation is surrounded by what?

anions

ions in metals can be easily arranged without breaking the metallic bonds, however metals tend to be easily what?

reshaped

What about why metal bonds are malleable and ductile is true?

Metals ions slide past each other on a sea of electrons without breaking bonds

What best explains the observation that metals are malleable and ionic crystals are brittle?

their chemical bonds

Under what conditions can potassium bromide conduct electricity?

both when melted or dissolved in water

Metallic bonds would most likely form between what?

two metals

Many metals are ductile, can be drawn into thin wires without breaking because..?

cations are still surrounded by electrons when they shift their positions in the lattice

Because the particles in ionic compounds like corundum, Al₂O₃, are more strongly attracted than in molecular compounds like H₂O, the melting points of ionic compounds are what?

higher than melting points of molecular compounds

roups of atoms held together by a mobile sea of electrons have what kind of bonds?

metallic

Two atoms held together by shared electrons have what kind of bonds?

covalent

A molecular compound is more likely than metals or ionic compounds to what?

vaporize at room temperature, melt at room temperature, and not conduct electricity

What is an example of an ionic compound, not a molecular formula? 

CaF₂

What diatomic molecule is joined by a single covalent bond?

Cl₂

The structure of an ionic compound like table salt, NaCl, or chalk, CaCO₃, is what?

a rigid crystal

As light strikes the surface of a metal, the electrons in the electron sea do what?

absorb and re-emit the light

A  molecule, like H₂O or CO₂, held together by shared electrons have what kind of bonds?

covalent

Malleability and ductility are characteristic of substances with what?

metallic bonds

In the electron-sea model with mobile electrons the metallic bond…

mobile electrons are shared by all the atoms

How many covalent bonds are there in PH₃

3