History
John Dalton came up with the 5 big ideas that together we call the...
Atomic Theory
How many grams in 1 mole of iron?
55.845 grams Iron
40
Protons in the nucleus have the same charge. What keeps their repulsion from blowing the nucleus apart?
nuclear forces
What is the molar mass of water?
18.015 g/mol
Rutherford's gold foil experiment showed that most of the volume of the atom was __________, but there is a small __________ charged center.
empty space, positive
How many grams are there in 5.3 moles of carbon?
64 g C
2
The mass of a mole of something is called the...
molar mass
If a sample contains 3.0 moles of carbon dioxide (CO2) how many total moles of atoms would it have?
9 moles of atoms
Democritis named atoms, in greek it means...
indivisible
How many atoms in 1 mole iron?
6.022 x 1023 atoms in 1 mole
45Sc represents an atom with how many neutrons?
24
the unit that measures things on the scale of atoms (aka, nearly the mass of a single proton or neutron)
Explain why the same number of molecules different substances have different masses.
Because atoms of different elements are different masses, (more or less protons and neutrons)
Dalton observed that it didn't matter the origin of a sample, if it contained a certain substance the ratio between elements in it was always the same. What law was based on this?
definite proportions
How many grams in 5.7 x 1033 atoms of carbon?
1.1 x 1011 grams carbon
45Sc represents an atom with how many protons?
24
Each unique type of nucleus is a __________. Ex: C-14
nuclide
What is the difference between an elements average atomic mass and its molar mass?
the unit (amu vs g/mol)
Dalton observed that some elements can form more than one element, and when they did the ratios of the elements were different and by typically by whole number ratio changes. What law does this demonstrate?
Multiple Proportions
Sucrose (table sugar) is a polymer made of two glucose molecules put together. Sucrose's formula is C12H22O11. If a sugar cube's mass is 4.0g, how many molecules of sucrose does it contain?
7.0 x 1021 molecules of sucrose
Write the symbol and hyphen notation representing an nuclide with the following: 19 protons, 21 neutrons, and 19 electrons
potassium-40, 40K
The value 6.022 x 1023 is called __________ and represents the number of things in a mole.
Avogadro's number
Element X has the following isotopes: X-33 has a mass of 33.01amu and represents 80.00% of the element's atoms. X-34 has a mass of 33.99amu and represents 15.00% of the element's atoms. X-35 has a mass of 35.11 amu and represents 5.000% of the element's atoms. What is the average atomic mass of the element?
33.26 amu