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Chemistry Chapter 2 Homework

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34,34,41 protons, electrons, neutrons
Correct
The isotope is used medically for the diagnosis of pancreatic disorders.
Part A
How many protons, electrons, and neutrons does an atom of have?
Express your answers as integers separated by commas.
114
48 Cd
An atom of element X contains 48 protons and 66 neutrons.
Part A
Identify the element, and write the symbol for the isotope in the standard format.
Express your answer as an isotope.
13p, 14n
How many protons and neutrons are in the nucleus of the following atoms? 27 Al
16p, 16n
How many protons and neutrons are in the nucleus of the following atoms? 32 S
30p, 34n
How many protons and neutrons are in the nucleus of the following atoms? 64 Zn
82p, 125n
How many protons and neutrons are in the nucleus of the following atoms? 207 Pb
107.9
Naturally occurring silver consists of two isotopes: (51.84%) with an isotopic mass of 106.9051 and (48.16%) with an isotopic mass of 108.9048 .
Part A
What is the atomic mass of silver?
Express your answer using four significant figures.
25.982
Magnesium has three naturally occurring isotopes: (23.985 ) with 78.99% abundance, (24.986 ) with 10.00% abundance, and a third with 11.01% abundance.
Part A
Look up the atomic mass of magnesium, and then calculate the mass of the third isotope.
Express your answer using five significant figures.
4p,2e
How many protons and electrons are in each of the following ions? Be 2+
37p,36e
How many protons and electrons are in each of the following ions? Rb+
34p,36e
How many protons and electrons are in each of the following ions? Se 2-
79p,76e
How many protons and electrons are in each of the following ions? Au 3+
carbon tetrachloride
.What is the name of the covalent compound CCl4 ?
Hint A.1 How to approach the problem
Hint A.2 Determine the first element named
Hint A.3 Determine the prefixes
Enter the full name of the compound
dinitrogen pentaoxide
.What is the name of the covalent compound N2O5 ?
Hint A.1 How to approach the problem
Hint A.2 Determine the first element named
Hint A.3 Determine the prefixes
Enter the full name of the compound
magnesium nitrate
What is the systematic name of Mg(No3)2?
Hint A.1 How to approach the problem
Hint not displayed
Hint A.2 Name the cation
Hint not displayed
Hint A.3 Name the anion
amonium chlorite
What is the systematic name of NH4ClO3?
Hint B.1 How to approach the problem
Hint not displayed
Hint B.2 Name the cation
Hint not displayed
Hint B.3 Name the anion
Hint not displayed
lead(II) oxide
What is the systematic name of PbO?

Hint C.1 How to approach the problem
Hint not displayed
Hint C.2 Name the cation
Hint not displayed
Hint C.3 Name the anion
Hint not displayed
Learning Goal: To name covalent compounds using the chemical formulas and systematic naming rules.
Many covalent compounds have common names that are not related to their chemical formula. However, systematic names for the compounds can be determined from the chemical formula of the compound by using an agreed-upon naming conventions.











.
*Some compounds are always named by their common name
>H_2O (water)
> NH_3 (ammonia)
> PH_3 (phosphine)
> CH_4 (methane)
>SiH_4 (silane)
*Name elements with oxygen as oxides, except in case of fluorine.
>SeO_3
(selenium trioxide),
>OF_2
(oxygen difluoride)
*Use Greek prefixes to denote the number of atoms of each element present. However, the mono prefix is only used when necessary.
>N_2O
(dinitrogen monoxide)
*Name the second element using the ide suffix.
> HCl*
(hydrogen chloride)

>*Note that {HCl}{(aq)} is the acid form of HCl and is called hydrochloric acid.
*Name the element farthest to the left in the periodic table first. If the elements are in the same column, use the bottom one first.
>SeO_3
(selenium trioxide)
Learning Goal: To name ionic compounds from the chemical formula.
Because the common names of many chemical compounds are not helpful in indicating the chemical nature of the compound (e.g., the common name "table salt" gives no clue that this compound is composed of sodium and chlorine, \rm NaCl), systematic names have been introduced to accurately identify compounds. The naming of simple ionic compounds is relatively straightforward, once you understand the naming system.

Ionic compounds are named according to their cation first, followed by their anion. Once the cation is named, the anion is then named. The naming conventions are listed in the tables to the right.

Finally, although ionic compounds need to have an overall neutral charge, the number of cations or anions are not mentioned in the formula name. For example, \rm AlCl_3 is aluminum chloride, not aluminum trichloride
Naming convention for cations
If the element forms only one ion, simply name the element.
K+ (potassium)
Naming convention for cations
Cations that make multiple ions are distinguished by Roman numerals.
Fe{3+} [iron(III)]
Naming convention for cations
Polyatomic ions have special names
NH_4+ (ammonium
Naming convention for anions
If the element forms only one ion, add ide to the element name.
Cl- (chloride)
Naming convention for anions
Oxoanions use ite for the anion with fewer oxygen atoms and ate for the anion with more oxygen atoms.
>SO_4{2-}~ (sulfate)
>SO_3{2-}~ (sulfite)
Naming convention for anions
Halogens and transition metals that can form up to four oxoanions require distinguishing prefixes.
>ClO- (hypochlorite)
>ClO_2}- (chlorite)
>ClO_3^- (chlorate)
>ClO_4}- (perchlorate)
Learning Goal: To learn to write the systematic name of ionic compounds given the chemical formula and to write the chemical formula given the systematic name.
Learning Goal: To learn to write the systematic name of ionic compounds given the chemical formula and to write the chemical formula given the systematic name.
Ionic bonds form when one atom completely transfers one or more electrons to another atom, resulting in the formation of ions. Positively charged ions (cations) are strongly attracted to negatively charged ions (anions) by electrical forces. All chemical compounds can be named systematically by following a series of rules. Binary ionic compounds are named by identifying first the positive ion and then the negative ion. Naming compounds with polyatomic ions involves memorizing the names and formulas of the most common ones.
barium nitrate
Barium is a metal that has only one oxidation state. Therefore it is not necessary to write II in parentheses in the systematic name. Only those metals with more than one oxidation state must have its state written in the name.
Give the systematic name for the compound Na(No3)2 . Spell out the full name of the compound.
manganese(III) sulfate
Although it seems like a small difference, manganese(II) and manganese(III) behave much differently chemically. They even form different-colored compounds because of the number of electrons they have to bond. Therefore it is very important to specify which oxidation state is being used.
Give the systematic name for the compound Mn2(SO4)3. Spell out the full name of the compound.
BaO
All of the elements in group 2 form ions with a +2 charge. That is because all of these elements need to lose two electrons to gain stability. After losing the electrons, there is an excess of two protons, which results in a +2 charge.
Enter the formula for the compound barium oxide. Express your answer as a chemical formula.
Pb3(po4)2
Lead, like iron, has more than one oxidation state, so it is necessary to put the oxidation state of the metal in parentheses. Elements in group 1 and 2 only have one oxidation state and so there is no need for Roman numerals in their systematic name.
Enter the formula for the compound lead(II) phosphate. . Express your answer as a chemical formula.
The chemical formula of covalent compounds can be easily determined from the systematic name of the compound. Greek prefixes are used to indicate the number of atoms of each element present in the compound.
...
Number 1
Prefix
mono
Number 2
Prefix
di
Number 3
Prefix
tri
Number 4
Prefix
tetra
Number 5
Prefix
penta
Number 6
Prefix
hexa
Number 7
Prefix
hepta
Number 8
Prefix
octa
Number 9
Prefix
nona
Number 10
Prefix
deca
NO
What is the formula for the compound nitrogen monoxide?
Express your answer as a chemical formula.
P4O10
What is the formula for the compound tetraphosphorus decoxide?
Express your answer as a chemical formula.
CH4
What is the formula for the compound methane?
Express your answer as a chemical formula.
KMnO4
What is the chemical formula for potassium permanganate?
Express your answer as a chemical formula.
CuSO4
Blue vitriol is commonly used in industrial dyeing processes. What is the chemical formula for blue vitriol, whose systematic name is copper(II) sulfate?
Express your answer as a chemical formula.
Na2CO3
Sodium carbonate is used in the manufacture of paper. What is the chemical formula for this compound?
Express your answer as a chemical formula.
phosphorus pentachloride
What is the name for the compound PCl_5 ?
Spell out the full name of the compound.
dinitrogen tetrahydride
What is the name for the compound \rm N_2H_4 ?
Spell out the full name of the compound.
KCl
Write formulas for the following binary compounds. Potassium chloride
Express your answer as a chemical formula.
SnBr2
Write formulas for the following binary compounds.Tin(II) bromide
Express your answer as a chemical formula.
CaO
Write formulas for the following binary compounds. Calcium oxide
Express your answer as a chemical formula.
BaCl2
Write formulas for the following binary compounds. Barium chloride
Express your answer as a chemical formula.
AlH3
Write formulas for the following binary compounds. Aluminum hydride
Express your answer as a chemical formula.
carbon tetrachloride
Name the following binary molecular compounds. CCl4
chlorine dioxide
Name the following binary molecular compounds. ClO2
dinitrogen monoxide
Name the following binary molecular compounds. N2O
dinitrogen trioxide
Name the following binary molecular compounds. N2O3
Na2O2
Write formulas for each of the following compounds. Sodium peroxide
Express your answer as a chemical formula
AlBr3
Write formulas for each of the following Aluminum bromide
Express your answer as a chemical formula.
Cr2(SO4)3
Write formulas for each of the following compounds. Chromium(III) sulfate
Express your answer as a chemical formula