Chemistry final semester 1

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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


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