In the 1700s what did all chemists believe about elements?
What is "that they were substances that could not be further broken down"
100
In what years was Dalton's belief about indivisible atoms disproved?
What is "In the late 1800s"
100
What is the atomic number of carbon: 6, 12, 20, or 40?
What is "6"
100
How do you know which isotope of a given element is the most common isotope?
What is "according to the periodic table."
100
What does the average atomic mass of an element depend on?
What is "the mass and relative abundance of its isotopes"
200
What is a chemical reaction?
What is "the transformation of a substance or substances into one or more new substances"
200
What was the name of the equipment that led to the discovery of the electron?
What is "cathode-ray tube"
200
What contributes to the mass number?
What is "protons and neutrons."
200
What element has the most stable isotopes? And How many does it have?
What is "Tin, it has 10 stable isotopes"
200
What is a mole?
What is "the SI unit for amount of substance containing as many particles as there are in 12g of Carbon-12"
300
What does the law of conservation of mass state?
What is "that mass is neither created nor destroyed during ordinary chemical reactions or physical changes"
300
What is the name, location, and relative atomic mass of the negatively charged sub-particles in atoms?
What is "electrons, orbiting the nucleus, 0.000 5"
300
What components of the atom are similar in mass?
What is "protons and neutrons"
300
How do you designate the type of isotope that you are dealing with?
What is "using hyphen notation or the isotope's nuclear symbol"
300
What is Avogadro's Number and what does it relate?
What is "6.022 x 10^23. It relates particles and moles."
400
What do the laws of definite and multiple proportions have in common?
What is "that they both suggest that chemical compounds are composed of the same ratios or proportionality of each element or compound."
400
If the nucleus, was the size of a marble, what size would the atom be?
What is "the size of football field"
400
What determines the atomic number?
What is "protons"
400
How do you determine the number of neutrons of an atom?
What is "by subtracting the atomic number from the mass number."
400
What is molar mass, how do you calculate it, and what two things does it relate?
What is "the mass of one mole of a pure substance; you don't, it's on the periodic table; it relates grams and moles.
500
What points of Dalton's Atomic Theory have been challenged and disproved?
What is "2: atoms of elements have the same size, mass, and other properties, and 3: atoms cannot be subdivided, created, or destroyed."
500
What is the name given to the core of an atom, what is it composed of, and in what two ways do these components differ?
What is "nucleus; composed of protons and neutrons; protons have a positive charge, while neutrons have no charge; and the proton number of an element doesn't change."
500
Different isotopes can have different numbers of what?
What is "neutrons"
500
What are the three isotopes of hydrogen, which of those is the most abundant, and how many neutrons does it have?
What is "protium, deuterium, and tritium; protium is most abundant; and it has zero neutrons."
500
How do you determine the number of atoms in a given sample that is told to you in grams?
What is, "using the molar mass to go from grams to moles, then taking that molar mass and using Avogadro's number to go from moles to atoms."