Question | Answer |
formula of silver and selenium | Agse2 |
formula of Barium oxygen | Ba20 |
formula of lithium sulfur | Li2s |
formula of potassium and phosphorus | K3p |
formula of strontium and nitrogen | Sr2N |
formula of zinc and fluorine | Znf2 |
formula of ca p | Ca2p |
formula of Li Cl | LiCl |
formula of Ba br | Ba Br2 |
formula of Na S | Na2 |
formula of Ag O | Ag o |
Determine whether the following bonds are ionic,or covalent. | |
K--Br | Ionic |
c---o | Covalent |
Na---O | Ionic |
C---H | covalent |
Br---Br | covalent |
O----H | covalent |
Cs---Cl | ionic |
H----F | covalent |
Fe-----o | ionic |
S----H | covalent |
Describe how an ionic bond and covalent bond different. | Ionic is where one element touch on electrons whereas, covalent , the atoms must share. |
The nuclei of carbon and silicon have about the same tendency to attract electrons. what can you say about a chemical bond formed these two elements? ehat type would it be? | covalent bond
2 nonmetals |
Is highly soluble in water | Ionic |
Has a melting point of 1550C | ionic |
is hard, rough crystal | ionic |
When dissolved in water, does not conduct electricity | covalent |
is a gas at room temperature | covalent |
when dissolved in water, conduct electricity | covalent |
is a solid at room temperature | ionic |
Has a boiling point of 10C | covalent |
Is composed of metal and a nonmetals | ionic |
Is composed of a nonmetals and nonmetals | covalent |
Attractive forces between its "parts" are week | Covalent |
Attractive forces between its "parts" are strong | ionic |
Not very soluble in water | covalent |
Plastic water bottle (soft; melts easily): | covalent |
Concrete (hard; extremely high melting point) | ionic |
Gasoline (vaporizes readily, flammable: | covalent |
candy corn (soft; melts easily): | covalent |
Hydrogen and oxygen | covalent |
Magnesium and sulfur | Ionic |
Strontium and fluorine | ionic |
carbon and oxygen | covalent |
Magnesium and nitrogen | Ionic |
Nitrogen and oxygen | covalent |
Hydrogen and nitrogen | covalent |
Lithium and oxygen | ionic |
oxygen and fluorine | covalent |
Bromine and oxygen | covalent |
Hydrogen and iodine | covalent |
Magnesium and hydrogen | ionic |
The elements in column 18 of the periodic table are chemically inactive. | True |
All of the noble gases gas elements except neon have eight electrons in their outer most energy level. | false helium |
In covalent bonding, atoms can achieve a full octet of electrons by sharing electrons. | true |
A typical potassium ion has a positive charge because it has lost an electron. | true |
The following electrons dot structure shows a bromine atoms has lost an electrons to become an (br) ion. | false gained |
A crystal of the compound potassium fluoride consists of potassium and fluoride molecules. | False ions |
The formula for methane, CH4, indicate that each methane molecules contains one carbon atom and four hydrogen atoms. | true |
The stability of the the noble gas elements other than helium is a result of their having eight valence electrons | True |
Calcium has two valence electrons, and to become stable , it must gain two more electrons. | False lose two |
Argon is a noble gas elements. | true |
An ions is an atoms or group of atoms that is changed because it has lost or gained one or more than protons. | False electrons |
Compound with ionic bonds tend to be brittle. | True |
The formula C3H8 tells you that this compound contains three carbon atoms and eight hydrogen atoms. | true |
Covalent bonds involve electrons shared between two atoms. | True |
In the electrons dot structure HC1 the pair of dots between the H and CL means that the hydrogen and chlorine atoms transfer a pair of electrons between them | False share |
Two atoms cannot share more than one pair of electrons between them. | False can |
In general, ionic compounds are more likely to dissolves in water than are covalent compound. | True |
Ionic compound conduct an electric current in the melted state. | True |
The force of attraction between molecules tend to be strong. | False weak |
Sugar is an example of covalent compound. | True |
Formula of Sodium and iodine is | NaI |
Use each of the terms below just once to complete the passage. | Fill in the blanks |
When it react with a fluorine atoms, a potassium atoms loses one electrons, forming (n)(1). | Ion |
Fluorine gains the electrons and charged atoms attract each other, This attraction is called. | Ionic bond |
The type of compound formed in this reaction, potassium fluoride, is called a (n). | Ionic compound |
As a result of this reaction, the atoms of both potassium and fluorine have a stable set of outer electrons, an arrangement known as a(n) is. | Noble gases configuration |
The statement that predicts that potassium will become stable by losing one electron and that fluorine will become stable by gaining one electron is the . | Octet rule |
The regular, repeating arrangement in potassium fluoride is called a(n) is. | Crystal |
Potassium and fluoride, like other compound of the same general type, is a (n) is. | Electrolyte |
In contrast to potassium fluoride, nitrogen monoxide is a(n)is. | covalent compound |
Because nitrogen atoms in it share electrons with oxygen atoms in a kind of bond known as a(n). | Covalent bond |
In contrast to potassium fluoride, the smallest unit of nitrogen monoxide is a(n) is. | Molecules |
The force of attraction between particles, which is called. | Interparticle force s very different in these two compounds. |
Both potassium fluoride and nitrogen monoxide are represented by a set of chemical symbols that represent their composition the formula for potassium fluoride, foe example is KF, and for nitrogen monoxide, is No. | Formula |
Multiple Bonds | Define the following |
Single bonds: | When an atoms share a pair of electrons |
Double bonds: | sharing two electrons |
Triple bonds: | sharing three electrons |
Oxidation numbers review
Elements | sheet |
Chlorine | 7 valence electrons
gain 1
oxidation number 1- |
Potassium | 1 valence electron
lose 1
oxidation Number +1 |
magnesium | 2 valence electrons
lose 2
oxidation number 2+ |
Fluorine | 7 valence electrons
gain 1
oxidation number 1- |
Aluminum | 3 valence electrons
lose 3
oxidation number 3+ |
Sodium | 1 valence electron
lose 1
oxidation number 1+ |
Nitrogen | 5 valence electron
gain 2
oxidation 3- |
Oxygen | 6 valence electron
gain 2
oxidation number 2- |
Hydrogen | 1 valence electron
lose 1
oxidation number 1+ |
Iodine | 7 valence electrons
gain 1
oxidation number 1- |
Phosphorous | 5 valence electrons
gain 3
oxidation number 3- |
Calcium | 2 valence electrons
lose 2
oxidation number 2+ |
Sulfur | 6 valence electrons
gain 2
oxidation number 2- |
An atoms that gain one or more electrons will have a. | Negative charge |
An atoms that loses one or more electrons will have a | positive charge |
An atoms that gains or loss one or more electrons is called an | Ions |
A positive ions is called a ------------and negative ions is called an -----------. | Caution, an ion. |
What type of elements one (metals or nonmetals)? Elements two/ | Both nonmetals |
In ionic bonding metals ------------their electrons to nonmetals so they have a filled outer energy level. | Lose |
In covalent bonding nonmetals -----------their electrons so they both have a filled outer energy level. | Share |
When ------ form, they have -------- that differ greatly from the properties of the --------- from which they are. | Compound, properties, elements,made |
The ------- of the compound depend on what happens to their constituent ----------- when the compounds------------. | properties, atom, form. |
-------------- properties provide clues about what happens on the --------- level. | Microscope, secpre. |
Table salt | compounds |
Water | Compound |
Sulfur | Elements |
Chlorine gas | Elements |
Carbon dioxide gas | compound |
Dry ice | Compound |
Properties of | Ionic compound |
Common Phase | Crystalline Solids |
Melting | High |
Breaking of bonds | Very strong |
Solubility | Many soluble in water but not in nonpolar liquid. |
Conduction | Conduct electricity when melted. |
Properties of | Covalent compound |
Common Phase | Gases, liquid , or water solids. |
Melting | low |
Breaking of bonds | Soft or brittle solid forms |
Solubility | Many soluble in nonpolar liquids but in water. |
Conduction | Poor electrical conductors in all phases. |