An atom with an unequal number of protons and electrons.
What is an ion?
100
An atom with 11 protons and 12 neutrons has an atomic mass of this.
What is 23?
100
Melting point is this type of property.
What is physical/intensive?
100
When multiplying two numbers in scientific notation, you do this with the exponents.
What is add them?
100
He was a Greek philosopher often credited as the first to propose that matter was made of tiny indivisible particles called atoms.
Who was Democritus?
200
Where protons and neutrons are found.
What is the nucleus?
200
The average atomic mass of a sample containing 5 trillion atoms of Carbon-12 and 5 trillion atoms of C-14.
What is 13?
200
Properties that depend on the amount of a substance present.
What are extensive properties?
200
How close a measured value is to an accepted/literature value.
What is accuracy?
200
In the late 1890's, he determined the charge-to-mass ratio of a cathode ray particle, thereby discovering the first subatomic particle, the electron.
Who was (J.J.) Thomson?
300
Atomic mass 16, with 8 neutrons.
What is oxygen?
300
Bromine's average atomic mass is 79.904 amu. This means that the most common bromine isotope is bromine-80. (true or false)
What is false?
300
An ability of a substance to combine with or change into one or more other substances.
What is a chemical property?
300
Divide mass by this to know the density.
What is volume?
300
Known as the 'father of nuclear physics,' he collected data using from the 'gold foil experiment.'
Who was (Ernest) Rutherford?
400
6 protons and 6 neutrons, surrounded by 6 electrons.
What is carbon?
400
The average atomic mass of boron.
Relative abundance of boron-10 = 20%
Relative abundance of boron-11 = 80%
Consider atomic masses of each isotope to be exactly the mass number.
What is 10.8 amu?
400
The two forms of matter that flow to take the shape of their containers.
What are liquid and gas?
400
The amount of water that can be separated into 10.0 g of hydrogen and 79.4 g of oxygen
What is 89.4 g?
400
He discovered the subatomic particle that carries no electrical charge.
Who was (James) Chadwick?
500
Protium, deuterium, and tritium, for example.
What are isotopes?
500
The average atomic mass of chromium.
Relative abundance of chromium-50 = 4.35%
Relative abundance of chromium-52 = 83.79%
Relative abundance of chromium-53 = 9.50%
Relative abundance of chromium-54 = 2.36%
Consider atomic masses of each isotope to be exactly the mass number.
What is 52.1?
500
A form of matter that does not occur naturally on Earth except in lightning bolts.
What is plasma?
500
20 g of sucrose (C12H22O11 contains 8.44 g of carbon and 10.26 g of oxygen. The percent by mass of hydrogen in sucrose is this.
What is 6.50%
500
Early Greek philosophers did not have the concept of the atom, but instead believed that all matter was formed of these four 'elements.'