Atomic Theory Scientists
This subatomic particle has a positive charge.
What is a proton?
Atoms of the same element with different numbers of neutrons.
What is an isotope?
This element has 20 protons.
What is Calcium?
How many pencils would make up a mole of pencils?
6.02 x 1023
This scientist proposed that electrons orbit the nucleus in fixed paths at fixed energy levels just like planets orbit the sun.
What is Niels Bohr?
This subatomic particle's main contribution to the atom is to give the atom more mass.
What is a neutron?
The atomic number is the same as the number of this particle.
What is a proton?
What is the name for the mass in grams of one mole of any substance
molar mass
This scientist described the atom as the smallest, most indestructible piece of matter.
Who is John Dalton?
This subatomic particle gives an atom both its chemical and physical properties.
What is an electron?
Record the hyphen notation of an atom of Oxygen that has 10 neutrons.
What is Oxygen-18?
What is the average atomic mass of Rb?
What is 85.47 g/mol?
If carbon dioxide has a molar mass of 44.01 g/mol, how many moles would make up a 132.03?
3.00 mol CO2
This scientist proposed that electrons are located in areas called "clouds" around the nucleus and we can only know the probability of where they are at any given time.
Who is Schrodinger?
These 2 subatomic particles give the atom its mass.
What are protons and neutrons?
This is the formula for mass number.
What is # of protons + # neutrons?
Explain how it is possible to have three different forms of hydrogen.
What is they are isotopes of one another?
2.5 moles of water is equivalent to _________ grams of water?
45.05 g of water
An ancient Greek philosopher who theorized that there must be some particle that is the smallest form of matter and called it "atomos".
Who is Democritus?
This subatomic particle has virtually no mass.
What is an electron?
Magnesium-25 has this number of neutrons.
What is 13 neutrons?
How is ion formed?
Ion is formed when a neutral atom loses or gains electrons
How many grams of iron compose 3.01 x 1023 atoms of Fe?
27.93 grams Fe