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Unit 3 Test

Mr. Holden's Unit 3 Test

QuestionAnswer
English Physicist ____ conducts the famous _____ _____ experiment. Which determines that the ____ is comprised of a _____, _____,______ charged nucleas surronded by ______ through empty space. Ernest Rutherford, Gold Foil, atom, tiny, dense, positively, electrons.
A subatmoic particle can be? Electrons, Protons, Neutrons.
The Proton is located _____ the nucleas and has a charge of ____and a relative mass of ___ amu, and a mass of ____g. Inside, +1, 1, 1.6726 x 10^-24
The Neutron is located ___ the nucleas and has a charge of ____and a relative mass of ___ amu, and a mass of ____g. Inside, 0, 1, 1,6749 x 10^-24
The Electron is located ___ the nucleas and has a charge of ____ and a relative mass of ___ amu, and a mass of ____g. Outside, -1, 0, 9.19 x 10^-28
The atmoic number is the number of ____ in an atom and determins the ____ of the atom. Protons, Identity
A neutral atom contains an = number of ____ and _____. Protons(+), Electrons(-)
The mass number of an atom is the ____ +____. Protons, Neutrons.
13/6C the element symbol is ___, the mass number is ____, and the atomic number is ____. C, 13, 6
Atoms of the same element with a different number of neutrons are? Isotopes
In this other Nuclear symbol notation X-A, X is the ____ ____, and A is the ____ _____. Element symbol, Mass Number
The average atomic mass is the ________. Weighted average of atomic masses of all naturally occuring isotopes of an element.
Do a practice problem for average atomic mass when you get this card. ok
Avogadro's number is _____ x ____ in ____. This number represents the number of _____ in a sample of an _____ with a _____ numerically equivalent to its ___ ___ ___. 6.022 x 10^23, atoms, element, mass, average atomic mass. Ex:1.01 g H = Avogadros number in atoms.
When you get this card do a problem of switching Mols to atoms, atoms to grams, or grams to mols. ok
A mol is what? 6.022 x 10^23atoms or a way to abbreviate Avogadros number.
Molar mass is the mass of 1 mole of the ______/_____. Molecule, compound.
Molecules and Compounds same thing but not rly. goodluck hope its not on the test
Formula Unit is _____. Units of g/mol.
Percent Compositon = ____/_____ x ____, Part, Whole 100.
To calculate percent composition you first ____, then you _____, finally you _____. Calculate the molar mass of everything, Divide mass of atoms of one element by the whole, then you make is apercentage by doing part/whole x100 which = g/mol.
The Empirical Formula is the _____, ____, ____, of _____, in a ____. Simplest, whole, number ratio, atoms, compound.
The 3 steps to calculate the Empirical formula is by 1st ____, then you _____, finally you ___. Convert the g to moles for each of the elements, Divide the moles of each element by the smallest amount of moles, Find the ratio of Moles and that represents the number of atoms in the formula.
When you get this card do a problem on Emprical formulas. ok
% = g in empircal formulas. ok
When finding the Molecular formula you need the ____ of the ____, then you need to _____, finally you ____. Molar mass, Empirical formula, Divide molar mass of actual formula by molar mass of empirical, multiply atoms of empirical by thhe number from the last step.
An ionic compound that has a specific number of bonded ____, as part of its ____ _____ is what? Water moecules, crystal structure, HYDRATE
MgSO4 ยท 7H2O is what? Magnesium Sulfate Hepta Hydrate
A hydrated crystal may be heated until water is removed this creates a _____. Anhydrous compound
Anhydrous compounds are said to be? Desicants
A desicant is a _____. Substance that will attract and absorb water fromt he atmosphere ex silica packets.
Created by: Anand27
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