Which state of matter has an indefinite shape and volume?
What is a gas
100
What is the law of conservation of mass?
What is matter is neither created or destroyed; rather it changed form
200
What was the difference between Mendeleev's periodic table and the table of today in terms of their organization?
What is organized by atomic mass instead of atomic number
200
What are the rows and columns of the periodic table called?
Rows = periods
Columns = Group/family
200
Argon's atomic number is 18 and mass number is 39.948. How many protons, neutrons, and electrons does it have?
What is 18 protons, 18 electrons, 22 neutrons
200
Which state of matter has closely aligned vibrating particles with a definite shape and volume?
What is a solid
200
What are two signs of a chemical change?
What are a color change, gas production, production of a precipitant.
300
What did Niels Bohr's atomic model assume?
Electrons travel in well-defined paths around the nucleus
300
In terms of phase change, what is the difference between dry ice and regular ice?
What is dry ice sublimates, regular ice melts to a liquid
300
What is going from a gas to a liquid called?
What is condensation
300
Rutherford's gold experiment determined what major finding?
The positively charged nucleus of an atom is concentrated in a small area in the center
300
What does ductile mean?
The ability to be drawn into wires
400
How much does 2 moles of Carbon weigh?
What is 24 grams
400
what is avagadro's number
What is 6.022 x 10^23
400
What are the four tenets of Dalton's atomic theory?
All matter is composed of atoms
Atoms of different elements have different properties
Atoms of the same elements have similar properties
Atoms combine in combinations
400
Which has more thermal energy: a cup of coffee at 100 degrees Celsius or a swimming pool at 10 degrees Celsius?
What is a swimming pool
400
What is sublimation?
Solid to gas
500
Who invented the proton-neutron model of the atomic nucleus in the 1930's
James Chadwick
500
Thallium-201 is radioactive and has an atomic number of 81. How many protons, neutrons, and electrons does it have?
What is 81 protons, 81 electrons, and 120 neutrons
500
How many moles of Carbon are in 36g of carbon?
What is 3
500
How could you test the law of conservation of mass using acetic acid, sodium carbonate, a balance and a plastic bag?
What is see the demo
500
What is the difference between heat, thermal energy, and temperature?
Heat = movement of thermal energy from hot to cold
Thermal Energy = total kinetic energy in a substance
Temperature = Average kinetic energy