Chemistry 7 - Pre Comp Study Guide Packet
Na number of valence electrons
1
Sodium-21 number of valence electrons
1
What period is He in?
1
Na most likely ion charge?
1+
Br most likely ion charge?
1-
Sodium-21 number of neutrons
10
Sodium-21 atomic number
11
Sodium-21 number of electrons
11
Sodium-21 number of protons?
11
What group is Ag in?
11
¹¹⁹Sn Mass number
119
What group is Na in?
1A
Write the electron configuration of Li⁺
1s^2
Write the noble gas (shorthand) notation for Li⁺
1s^2
Write the electron configuration of Na
1s^2 2s^2 2p^6 3s^1
Write the electron configuration of Cl
1s^2 2s^2 2p^6 3s^2 3p^5
Write the electron configuration of S²⁻
1s^2 2s^2 2p^6 3s^2 3p^6
How many significant figures are in 2500 mL?
2
Sr most likely ion charge
2+
S most likely ion charge
2-
Sodium-21 mass number
21
What group is Sr in?
2A
Al number of valence electrons
3
How many significant figures are in 0.0150 cm?
3
What period is Na in?
3
Al most likely ion charge
3+
What period is Br in?
4
¹¹⁹Sn Number of valence electrons
4
What period is Ag in?
5
What period is Sr in?
5
¹¹⁹Sn Atomic number
50
¹¹⁹Sn Number of electrons
50
What group is Br in?
7A
What group is He in?
8A
define group
A column on the periodic table
Define Anion
A negatively charged ion
Provide the element name from the following description? The metal with the smallest molar mass in group 13
Al
Provide the element name from the following description? A metal with 35 protons in its nucleus
Br
Calcium nitride chemical formula
Ca3N2
gas movement of particles
Can move freely and quickly in all directions in the container
Which atom or ion has the larger radius? Cl⁻ or Cl
Cl -
What is the correct order for obtaining salt from a mixture of sand and salt?
Dissolving in water - filtration - evaporation
Arrange the following in the increasing (smallest to largest) order of size: Ba, Si, F
F, Si, Ba
Magnesium chlorate chemical formula
Mg(ClO3)2
Provide the element name from the following description? The atmosphere is 78% this diatomic element
N2
Which atom or ion has the larger radius? Na or Na⁺¹
Na
What chemical family is He in?
Noble gases
Which atom or ion has the larger radius? O²⁻ or O
O 2-
Lead (II) Chloride chemical name
PbCl2
Arrange the following in the increasing (smallest to largest) order of size: Te, S, Se
S, Se, Te
Provide the element name from the following description? The noble gas element in period 5
Xe
liquid movement of particles
can slide past one another
Shape of a liquid
flexible shape
Shape of gas
flexible shape
(NH₄)₃PO₄ - ionic or covalent?
ionic
AgNO₃ - ionic or covalent?
ionic
AlBr₃ - ionic or covalent?
ionic
Al₂O₃ - ionic or covalent?
ionic
Calcium nitride - Ionic or covalent?
ionic
Solid to liquid
melting
Is "Boils at 200 degrees celsius" a physical or chemical property?
physical
Is "dissolving salt in water" a chemical or physical change?
physical
define period
row on the periodic table
AgNO₃ IUPAC name
silver nitrate
solid to gas
sublimation
Define Mass number
total number of protons and neutrons
What type of electrons are shown on Lewis Dot Structures
valence electrons
Lewis dot structure for HBr
(change 2 dots linking H and Br to a single bond line)
Lewis dot structure for H₂Se
(change 2 dots linking H and Se to a single bond line)
Write the name and formula of the binary ionic compound formed by copper (II) and iodine
Copper (II) iodide, CuI2
Arrange the following in the increasing (smallest to largest) order of ionization energy: Cs, Ge, Ar
Cs, Ge, Ar
Which atom or ion has the larger radius? Al⁺³ or Al
Al
What chemical family is Na in?
Alkali metals
What chemical family is Sr in?
Alkaline Earth Metal
A(n) _____________ is a pure substance containing two or more elements that are _______________ combined. The elements in this thing always combine in _____________-number proportions.
Compound, chemically, whole
Iron (III) nitrate chemical formula
Fe(NO3)3
Provide the element name from the following description? The element whose atoms have 3 valence electrons in period 4
Ga
Gallium sulfide chemical formula
Ga2S3
What chemical family is Br in?
Halogens
Provide the element name from the following description? The only liquid metal at room temperature
Hg
Arrange the following in the increasing (smallest to largest) order of size: Al, Mg, P
P, Al, Mg
PCl₅ IUPAC name
Phosphorus Pentachloride
Write the name and formula of the binary ionic compound formed by Potassium and chlorine
Potassium Chloride, KCl
Sulfur hexafluoride chemical compound
SF6
Gallium sulfide - ionic or covalent?
ionic
Iron (III) nitrate - ionic or covalent?
ionic
Magnesium chlorate - ionic or covalent?
ionic
Potassium Sulfite - ionic or covalent?
ionic
Zn(OH)₂ - ionic or covalent?
ionic
Al - cation or anion?
cation
Na - cation or anion?
cation
Sr - anion or cation?
cation
Is a blue solid forming from mixing of two clear aqueous solutions a chemical or physical change?
chemical
Is burning gasoline a chemical or physical change?
chemical
Is flammable a physical or chemical property?
chemical
gas to liquid
condensation
Arsenic trichloride - ionic or covalent?
covalent
N₂O₄ - ionic or covalent?
covalent
PCl₅ - ionic or covalent?
covalent
Sulfur hexafluoride - ionic or covalent?
covalent
Indicate the separation technique used to separate a mixture of oil and water
decantation
gas to solid
deposition
N₂O₄ IUPAC name
dinitrogen tetroxide
Name the technique that uses the differences in boiling points of various substances to separate volatile liquid mixture
distillation
How many dots should be around an elemental symbol in a Lewis Dot diagram if it has a full octet?
eight
define valence electron
electrons in the outermost shell
A(n) ___________ is a pure substance that is made of only one kind of atom. The symbol for this thing is always one or two letters. When the symbol contains two letters, the first letter is always _______________ and the second letter is always _____________.
element, uppercase, lowercase
What is ionization energy?
energy needed to remove a valence electron
Define heat
energy transferred from one substance to another, based on difference in temperatures
Which separation technique is the best way to get salt from salty water?
evaporation
liquid to gas
evaporation
Shape of a solid
fixed shape
Volume of solid
fixed volume
volume of liquid
fixed volume
volume of gas
flexible volume
liquid to solid
freezing
A(n) mixture that is not uniformly mixed is called _____________.
heterogeneous
A mixture that is uniformly mixed is called ______________. A special name for this is a solution.
homogeneous
Draw the Lewis Structure for SeCl₂ and identify the number of unshared/lone pairs of electrons on the central atom.
https://lightcat-files.s3.amazonaws.com/problem_images/13016605dc4be707-1594303142515.jpg ~2 lone pairs
Lewis dot structure for H₂
https://scientifictutor.org/wp-content/uploads/2015/05/H2-Octet.jpg
Is Malleable and ductile a physical or chemical property?
physical
Is density a physical or chemical property?
physical
Is hammering a metal into foil a chemical or physical change?
physical
Is stretching copper into a wire a chemical or physical change?
physical
A mixture is made of two or more substances that are _____________ combined.
physically
define cation
positive ion
solid movement of particles
vibrate in place
Zn(OH)₂ IUPAC name
zinc hydroxide
Provide the element name from the following description? An element that forms diatomic molecules, found in period 3
Cl
¹¹⁹Sn number of protons
50
S number of valence electrons
6
¹¹⁹Sn number of neutrons
69
Sr number of valence electrons
2
Br number of valence electrons?
7
Arsenic trichloride chemical compound
AsCl3
What is the general periodic trend in atomic radius?
Atomic radius increased toward bottom left of periodic table
What is the general periodic trend in ionization energy?
Increases toward top 8 right of periodic table. Smaller atomic radius = harder to remove valence electrons
Lead (II) Chloride - ionic or covalent?
Ionic
Write the name and formula of the binary ionic compound formed by Iron (III) and sulfur
Iron (III) Sulfide, Fe2S3
Provide the element name from the following description? An element that reacts explosively with water, found in period 4
K
Arrange the following in the increasing (smallest to largest) order of ionization energy: K, Mn, Ga
K, Mn, Ga
Arrange the following in the increasing (smallest to largest) order of ionization energy: Li, Na, K
K, Na, Li
Potassium Sulfite chemical compound
K2(SO3)
Write the name and formula of the binary ionic compound formed by Manganese (IV) and oxygen
Manganese (IV) Oxide, MnO2
Write the name and formula of the binary ionic compound formed by sodium and nitrogen
Sodium nitride, Na3N
Identify the two components present in sodium sulfate solution.
Solute: sodium sulfate, Solvent: water
What family is Ag in?
Transition metals
Write the noble gas (shorthand) notation for Mg²⁺
[He] 2s^2 2p^6
Write the noble gas (shorthand) notation for Ne
[He] 2s^2 2p^6
Write the noble gas (shorthand) notation for S
[Ne] 3s^2 3p^4
Define temperature
a measure of kinetic energy of particles in a substance
What is a homogeneous mixture?
a mixture that is the same throughout
A special type of mixture that is a solid combination of two or more metals is called a(n) __________
alloy
IUPAC name for AlBr₃
aluminum bromide
Al₂O₃ IUPAC name
aluminum oxide
(NH₄)₃PO₄ IUPAC name
ammonium phosphate
Br - cation or anion?
anion
S - anion or cation?
anion
Define Isotopes
atoms of the same element with different number of neutrons
