chem 1 Exam 2
What is the name of XeF4
Xenon tetrafluoride
Enter the electron configuration of the ion formed by O
1s^22s^22p^6
Enter the electron configuration of the ion formed by K
1s^22s^22p^63s^23p^6
Beryllium has valence electron(s).
2
Calcium has valence electron(s).
2
Calculate the mass of 1.00×10241.00×1024 (a septillion) molecules of water.
29.9 g
In the ground-state electron configuration of Fe3+Fe3+, how many unpaired electrons are present?
5
Bromine has valence electron(s).
7
Xenon has valence electron(s).
8
Enter the electron configuration of the ion formed by Rb
[Kr]
Enter the electron configuration of the ion formed by Sr
[Kr]
The IE increases
across a row or group
Group 2
alkaline earth metals solutions in water
What are the possible values of the magnetic quantum number ml
all the integers in range from -l to +l, where l is an angular momentum quantum number
What are the possible values of the angular momentum quantum number l?
all the non-negative integers: 0,1,2,..., n-1, where n is a principal quantum number
What are the possible values of the principal quantum number n?
all the positive integers: 1,2,3, etc.
NH4Br
ammonium bromide
A flask contains 0.150 molmol of liquid bromine, Br2Br2. Determine the number of bromine molecules present in the flask.
9.03×1022 moleculesmolecules
Find the number of ibuprofen molecules in a tablet containing 200.0 mgmg of ibuprofen (C13H18O2).
amount = 5.839×1020 molecules of C13H18O2
negatively charged
anions
qualitative observation
are non-numerical observations
quantitive observations
are numerical aka measurements
Ba3N2
barium nitride
BaSO4BaSO4 Spell out the full name of the compound.
barium sulfate
Halogen
bromine
The Ionization energy decreases
down a column
If unpaired electrons then it is
paramagnetic and not diamagnetic
as you love left to right the atomic radius gets
smaller
NaClO4
sodium perchlorate
SrBr2
strontium bromide
What does the magnetic quantum number determine?
the orientation of the orbitalWhat does the magnetic quantum number determine?
What does the principal quantum number determine?
the overall size and energy of the orbital
no two electrons have
the same 4 quantum number
What does the angular momentum quantum number determine?
the shape of the orbital
Writing
the symbol fo the metal is written first followed by the non metal
Enter the ion formed from K
K+
Write the formula for the compound formed between potassium and sulfur.
K2S
copper(I) chloride
CuCl
Alkaline-earth metal
calcium Beryllium
positive charged ions
cations
Cations are smaller
cations are positive
Give the chemical symbol of an element in the third period (row) of the periodic table with three valence electrons.
Al
Group 1
Alkali metals soft shiny violent with water
When comparing the two species BaBa and Ba2+Ba2+ the larger of the two is
Ba
[Xe]6s2
Ba
cyanide
Be(CN)2
hydroxide
Be(OH)2
phosphate
Be3(PO4)2
chromate
BeCrO4
Between C and F, the larger atom is
C
calcium fluoride
CaF2
Between Cl and Sb , the element with the higher first ionization energy is
Cl
Sodium has valence electron(s).
1
The fuel used in many disposable lighters is liquid butane, C4H10C4H10. How many carbon atoms are in 4.00 gg of butane?
1.66×1023 carbonatomscarbonatoms
polyatomic ions are composed of two or more atoms held by a covalent bond
--
the ionization energy is the energy required to remove the electron from isolatied gaseous atom
--
Give the chemical symbol of an element in the third period (row) of the periodic table with six 3p3p electrons.
Ar
Between As and Po , the element with the higher first ionization energy is
As
iron(II) iodate
Fe(IO3)2
iron(III) hydroxide
Fe(OH)3
iron(II) phosphate
Fe3(PO4)2
Binary ionic compounds metal forms only one type of cation
Group 1 2 3 Ag Zn Sc
noble gases
Group 8
Between II and Kr, the larger atom is
I
Between Al and In, the larger atom is
In
[Kr]5s24d105p1
In
In the animation, you can see that the electrons occupy different orbitals according to the energy level of each orbital. A single box represents an orbital. The unpaired electron is represented as ↿↿ whereas the paired electrons in the same orbital are represented by two arrows pointing in opposite directions: ↿⇂↿⇂. Watch the animation and identify which of the following statements are correct.
In the LiLi atom, the 3s3s, 3p3p, and 3d3d orbitals have different energies. Electrons generally occupy the lowest energy orbital first. The CC atom has two unpaired electrons.
Between Mg and Ca , the element with the higher first ionization energy is
Mg
Give the chemical symbol of an element in the third period (row) of the periodic table with two 3s3s electrons and no 3p3p electrons.
Mg
When comparing the two species NiNi and Ni2+Ni2+ the larger of the two is
Ni
Enter the ion formed from O
O^2-
Between P and In , the element with the higher first ionization energy is
P
When comparing the two species PP and P3−P3− the larger of the two is
P^3-
lead(II) chromate
PbCrO4
Enter the ion formed from Rb
Rb+
Give the chemical symbol of an element in the third period (row) of the periodic table with four 3p3p electrons.
S
how many electrons can be put in each shell
S 2 P6 D 10 F 14
When comparing the two species S2−S2− and Ca2+Ca2+ the larger of the two is
S2−
[Ar]4s23d104p4
Se
Based on periodic properties, what two elements would you expect to be most like carbon?
Si,Ge
Between S and Sn, the larger atom is
Sn
Alkali Metal
Sodium
Enter the ion formed from Sr
Sr2+
[Ar]4s23d2
Ti
Noble
Xenon
covalent radius
equal to one half of the distance between two bonded atoms
Group 7
halogens
electron configuration
if has a plus or minus it is opposite AL3+ is minus three 10 instead of 12
ionic compounds
ionic compound is composed 3 dimensional has cairns and anions termed lattice
FeS
iron(II) sulfide
FePO4
iron(III) phosphate
as you move down a group it gets
larger
PbI4
lead(IV) iodide
Determine the mass of a sample of water containing 3.55×10223.55×1022 molecules of H2OH2O.
mass =1.06gg
ionic bonds
metals and nonmetals transfer of electrons
