Laws and Theories
Which law states that mass is neither created nor destroyed in a chemical reaction?
The law of conservation of mass
What subatomic particle has a charge of −1?
The electron
What do we call atoms of the same element with different numbers of neutrons?
Isotopes
What nuclide is the standard for the atomic mass scale?
Carbon-12
Which U.S. State is known as the "Sunshine State"?
Florida
Who proposed, around 400 BCE, that matter is made of tiny, indivisible particles?
Democritus
What did Thomson call his model of the atom, comparing it to a dessert?
The plum pudding model
What is the atomic number of an element equal to?
The number of protons
What number is equal to 6.022 × 10²³ particles?
Hint: includes the name of the person that came up with this number.
Avogadro’s number
Which NFL team drafted Drew Brees? (BEFORE he was on the Saints)?
Chargers
According to the law of definite proportions, table salt (NaCl) is always what percent sodium by mass?
39.34%
What experiment led Rutherford to discover the nucleus?
The gold-foil experiment
To find the number of __________, you subtract the atomic number from the mass number.
Neutrons
What is the molar mass of an element numerically equal to?
Its average atomic mass
Simone Biles is a record breaking Olympic athlete in what sport?
Gymnastics
Which of Dalton's five postulates turned out to be incorrect?
That atoms cannot be subdivided
What force holds protons and neutrons together in the nucleus despite their repulsion?
Nuclear force
Write the hyphen notation for an atom with atomic number 6 and mass number 14.
Carbon-14
Naturally occurring chlorine is 75.77% chlorine-35 (34.97 u) and 24.23% chlorine-37 (36.97 u). What is its average atomic mass?
35.45 u
Whose face is on a dime?
Franklin D. Roosevelt
In copper(II) oxide, 0.252g of oxygen combines with 1.00g of copper. In copper(I) oxide, 0.126g of oxygen combines with 1.00g of copper. What is the ratio of these two oxygen masses?
2 to 1.
Rutherford’s model showed the nucleus is incredibly small compared to the rest of the atom. Our slide’s example said if the nucleus were a marble, the rest of the atom would be the size of what object?
A football field
An atom has an atomic number of 20 and a mass number of 40. How many protons, neutrons, and electrons does it have?
20 protons, 20 neutrons, 20 electrons
How many atoms are in 4.00 mol of neon?
2.41 × 10²⁴ atoms
Which video game holds the world record for the most units sold in it's opening 24 hours? (With 11,210,000 units sold in the 24 hours after the release)?
GTA V