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ORG Chem

TermDefinition
The nucleus of an atom accounts for... most of the atoms mass but very little of its size.
The nucleus is made up of ... protons and neutrons.
neutrons particle charge? no charge
electrons particle charge? negative charge
proton particle charge? Positive charge
which subatomic particles are located in the atoms nucleus? Protons and Neurons
Write the nuclear symbol, including mass and atomic number: an atom that contains 28 protons and 30 neutrons... 28 protons + 30 neutrons = 58 which is the mass. nickel (Ni) is the atomic number of 28 (mirroring the protons)
A/Z (X). A is mass number, z is atomic number, x is chemical symbol. describe how to write a nuclear symbol
Neutrons = mass number - protrons Formula if given mass
The SI unit for ____ is kilograms mass
the SI unit for ____ is volume Cubic meters (m^3)
the SI unit for ____ is velocity meters per second (m/s)
the Si unit for ____ is area meters squared (m^2)
the SI unit for ____ is density kilogram per cubic meter (km/m^3)
the SI unit for _____ is Fahrenheit temperature
The elements that are monatomic are the ____ noble gases (Helium, neon, argon, xenon, krypton)
on the _____ temp scale, water boils at 373 degrees Kelvin Scale
on the _____ temp scale, water boils at 100 degrees Celsius scale
on the _____ temp scale, water boils at 212 degrees Fahrenheit scale
The Si units for ____________________ is joule. Energy
The Si units for ____________________ is heat. Unit Joule (J)
Density is an ______________________________ property because it does not depend on the amount of substance intensive property
mass and volume are ____ properties because it depends on amount extensive
Group 7A in the periodic table Halogens
Carbon symbol? C
Mercury symbol? Hg
Potassium symbol? K
Tin symbol? Sn
Physical property is a characteristic of a substance that can be observed or measured without changing the identity. include color, density, hardness, and melting and boiling points.
Chemical property Some major examples include flammability, toxicity, heat of combustion, pH value, rate of radioactive decay.
The melting point of H2O is 0 degrees Celsius. Chemical or physical property? Physical property. Boiling point
Iron combines with oxygen to form rust. Chemical or Physical property? chemical because it is two substances reacting together to make a new substance
The volume of a marble is 105 cm3. Chemical or physical property? Physical Property
Which type(s) of elements (metals, nonmetals or semimetals) are good conductors of electricity ? Metals (copper, silver, aluminum)
Which type(s) of elements (metals, nonmetals or semimetals), are on the far right on the periodic table? Nonmetals
Which type(s) of elements (metals, nonmetals or semimetals), include silicon? Metalloid, semimetals
The liquid metal at room temperature? Mercury (Hg)
Diatomic molecule in Group 5A? Nitrogen (recall HOFBRINCL's)
Group 6A period 3 ? Sulfur (S)
Group 2A period 6 ? Barium (Ba)
Classify each of the following as characterizing an element, compound or mixture. a. Fixed ratio of different elements Compound
Classify each of the following as characterizing an element, compound or mixture b. oil and water Mixture
Classify each of the following as characterizing an element, compound or mixture c. Cadmium Element
can be separated on the basis of physical properties Mixture
What is Röntgen known for? Discovery of X-rays
What did Becquerel discover? Spontaneous Radioactivity
who developed the nuclear model of the atom? Rutherford
what is an isotope? Atoms with the same number of protons but different numbers of neutrons. They share almost the same chemical properties, but differ in mass and physical properties.
Isotopes of an element have the same mass number. T/F? False. Isotopes have the same atomic number, not mass.
14^C Carbon Mass = 14 Atomic Number = 6 Protons/Electrons: 6 Neutrons = 14-6= 8
Created by: amy.still
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