Chemistry final semester 1
A piece of tin has a mass of 15.00 g and a volume of 5.00 cm^3. What is the density of tin?
3 g/cm^3
How would one express 356,000,000 in scientific notation?
3.56×10^8
Convert 67° C to kelvin
340.15
How would one convert 3.88×10^3mg to an ordinary number?
3880.mg
The ability of a measurement to match the actual value of the quantity being measured is called?
Accuracy
Identify the element that has the electron configuration 1s^2 2s^2 2p^6 3s^2 3p^1
Aluminum
The hottest part of the bunsen burner flame is located?
At the bottom
The total number of protons and neutrons of an atom is its what number?
Atomic
In an experiment with Crookes Vaccum tube, JJ Thomson observed that a beam of particles was deflected when it passed through an electric field. What particles did Thomson observe?
Electrons
Most of the volume of an atom is occupied by:
Empty space
The region around an atomic nucleus where an electron is likely to be moving is called a?
Energy level
How many significant figures are in the following number: 365.10
Five
How many electrons exist in a double bond?
Four
The part of the electromagnetic spectrum with the greatest amount of energy is the what ray spectrum?
Gamma
Which state of matter are the particles spread far apart from eachother?
Gas
The valence orbitals in an atom are the amount of outermost what and what orbitals
Orbitals and Innermost
What principle states that in one orbital a maximum of two electrons can be found and the two electrons must have opposing spins?
Pauli exclusion principle
Consider the element neon, bromine, and phosphorous. Which has 3 electrons the 3p sublevel?
Phosphorous
What electrical charge does a single electron have?
Positive
What element has the electron configuration [Ar]3d^10 4s^1
Potassium
An element is determined by the number of?
Protons
The atomic number of an atom is the number of?
Protons
What does the nucleus of an atom consist of?
Protons and Neutrons
The minimum amount of energy that can be gained or lost by an electron is a?
Quantum
Name four chemical changes
Rust, burn, decompose, ferment
The lowest sub-level in each principal energy level is represented by the symbol?
S
What are the four energy sublevels?
S,P,D,F
What is the correct formula for the covalent compund tetrasulfur hexafluoride?
S4F6
What is the correct name for the covalent formula SeF6?
Selenium Hexafluoride
A covalwnt bond is formed when two atoms?
Share valence electrons
How many electrons exist in a triple bond?
Six
What is the correct name for the formula Na2CO3?
Sodium carbonate
Which state of matter are the particles tightly packed together?
Solid
Which state of matter has a definite shape and definite volume?
Solid
What are the three states of matter?
Solid, liquid, gas
What element has the configuration [Kr]5s^2 4d^10 5p^4
Tellurium
Whose model of the atom was nicknamed the Plum Pudding?
Thomsons
How many electrons can a single orbital hold?
Two
How many electrons exist in a single bond?
Two
How many significant figures are in the following number: 27000
Two
The visible part of the electromagnetic spectrum that humans can see is the what light spectrum?
Visible
The distance between crests and waves is called?
Wavelength
What element has this electron configuration? [Kr]5s^2 4d^10 5p^6
Xenon
What is the electron configuration for Sn? (Noble gas configuration)
[Kr] 5s^2 4d^10 5p^2
How would one express 0.0000001
.1×10^6
Sodium has how many valence electrons?
1
The three basic components of an atom are:
1. Electrons 2. Protons 3. Neutrons
Name three facts about the nucleus of an atom.
1. Its small 2. Its dense 3. Its positively charged
In a lab experiment, you find the density of aluminum to be 3.14 g/mL. If the accepted value for the density of volume is 2.70 g/mL, what is your percent error?
1.16 g/mL
Name three facts about orbitals
1.Each has a characteristic 2.Each has a shape 3.Each are named by a letter (spdf)
What is the maximum number of electrons that can fill the D level?
10
What is the maximum number of electrons that can fill the F level?
14
Silicon-30 contains 14 protons. It also contains how many neutrons?
16
What is the correct name for the covalent formula S2O5?
Disulfur pentaoxide
Identify the element that has the electron configuration 1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^10 4p^6
Krypton
Which state of matter had a definite volume but indefinite shape?
Liquid
From the physical and chemical changes lab activity, what metal produced a white flame?
Magnesium
What element has the configuration [Ar]4s^2 3d^10
Manganese
What is the correct formula dor the ionic compound magnesium fluoride?
MgF2
In the periodic table, the principal quantum number corresponds to the what number?
N
Isotopes of an element contain different numbers of?
Neutrons
Ruthefords alpha particle experiment with gold foil demonstrated the existence of what part of the atom?
Nucleus
All isotopes if hydrogen contain how many protons?
One
What is the electron configuration of a nitrogen atom at ground state?
1s^2 2s^2 2p^3
Barium has how many valence electrons?
2
What is the maximum number of electrons that can fill the S orbital?
2
Calculate (6.00×10^9)/(3.00×10^3)
2,000,000
What is the maximum number of electrons in the nth principle energy level?
2,8,18,32
Calculate (8.00×10^7)/(4.00×10^2)
200,000
How would one convert 2.57×10^5mg to an ordinary number?
257000.mg
An aluminum isotope consists of 14 protons, 13 electrons and 14 neutrons. Its mass number is?
27
Aluminum has how many valence electrons?
3
Carbon has how many valence electrons?
4
Ag-109 has 62 neutrons. The neutral atom has how many electrons?
47
What is the electron transition that is accompanied by the emission of energy?
4p to 3p
What is the maximum number of electrons that can fill the P level?
6
Calculate (2.00×10^3)(3.00×10^6)
6,000,000,000
Convert 85.62km to m
85620m
A beryllium atom has 4 protons, 5 neutrons, and 4 electrons. What is the mass number of the electron?
9
Calculate (3.00×10^4)(3.00×10^3)
90,000,000
Convert 96,000kg to g.
96,000,000g
Why is the atom electrically natural?
Because it had the same number of protons and neutrons
What is the currently accepted model of the atom called?
Bohr's model
Name four physical changes
Boil, melt, cut, bend
Consider the elements neon, bromine, and phosphorous. Which has its highest energy level completely filled?
Bromine
List four chemical properties.
Burn, decompose, ferment, react
What element has the electron configuration 1s^2 2s^2 2p^6 3s^2 3p^6 4s^2
Calcium
Name four element that have four valence electrons
Carbon, silicon, germanium, tin
If the electron configuration of an element is 1s^2 2s^2 2p^6 3s^2 3p^5, the element is?
Chlorine
Identify the element that has the electron configuration 1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^7
Cobalt
List four physical propeties.
Color, hardness, melting point, and boiling point
From the physical and chemical changes lab activity, what metal produced a green flame?
Copper
A Lewis structure does not show what energies?
D&F
What is the lowest energy state of an atom called?
Ground state
What states that is is impossible to know both the position and path of an electron?
Heisenburg Uncertainty Principle
What principle states that electrons enter orbitals of lowest energy first?
Hunds rule
What principle states that every orbital in a subshell is singly occupied with one electron before any one orbital is doubly occupied?
Hunds rule
Bohr's model of the aton explained the spectra of the what atom?
Hydrogen
Helium-4 and helium-3 are what of the same element?
Isotopes
What scientist discovered the neutron in 1932?
James Chadwick
