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Match the following terms with the appropriate definition.
| Draggable item | arrow_right_alt | Corresponding Item |
|---|---|---|
Atom | arrow_right_alt | A regular atom in it's lowest energy state |
Isotope | arrow_right_alt | States that matter cannot be created or destroyed |
Excited State | arrow_right_alt | Energy is given off when light strikes a metal object |
Frequency | arrow_right_alt | The state in which electrons have moved out of their normal energy levels and have more energy |
Wavelength | arrow_right_alt | The number of waves that pass a gicen point in one second |
Electromagnetic Radiation | arrow_right_alt | The number of protons in an atom |
Electron | arrow_right_alt | Positively charged subatomic particle found in the nucleus of an atom |
Mass number | arrow_right_alt | The distance from crest to crest or trough to trough of a wave |
Atomic Number | arrow_right_alt | The equivalent of 6.022x10^23 |
Mole | arrow_right_alt | The sum of protons and neutrons |
Law of Conservation of Mass | arrow_right_alt | Negatively charged subatomic particles that are very small and found surrounding the nucleus of an atom |
Hertz | arrow_right_alt | A different form of an element that contains a different number of neutrons but has the same atomic number |
Ground State | arrow_right_alt | A form of energy that travels through space as waves at the speed of light |
Photoelectric effect | arrow_right_alt | The unit for frequency |
Photon | arrow_right_alt | the smallest unit of an element |
Proton | arrow_right_alt | Units of light energy |
Microwaves have higher energy than infrared waves.
The nucleus is comprised of positive protons and negative electrons.
Photons are emitted when an electron returns to ground state.
As wavelength increases, frequency and energy will decrease.
Red light has a shorter wavelength than ultraviolet light.
According to Dalton's theory, as it was originally published, atoms cannot be created, destroyed, or subdivided.
J.J. Thomson's use of the Cathode ray tube led to the discovery of the proton.
The law of definite proportions states that the composition of a pure substance is always the same regardless of the source.
Match the scientist with the correct contribution to the Atomic Theory.
| Draggable item | arrow_right_alt | Corresponding Item |
|---|---|---|
Erwin Schrodinger | arrow_right_alt | Used the gold-foil experiment to prove that the nucleus of an atom is very small and positively charged. |
Ernst Rutherford | arrow_right_alt | Used a cathode ray tube to show that the beam (electrons) must have a negative charge. |
Robert Millikan | arrow_right_alt | Developed an equation that treated electrons in atoms like waves. |
Neils Bohr | arrow_right_alt | Electrons have wave-like behavior and had specific frequencies. |
J.J. Thomson | arrow_right_alt | State that the nucleus is charged and surrounded by electrons that travel in fixed orbits as planets orbit the sun. |
Louis De Broglie | arrow_right_alt | State that electrons are lighter than protons and neutrons by using an atomizer to spray oil. |
Strontium consists of four isotopes with masses of 84.045 (abundance of 0.500%), 86.23 (abundance of 9.90%), 87.452 (abundance of 7.00%), and 87.963 (abundance of 82.6%). Calculate the atomic mass of strontium in amu. Round to FOUR significant figures.
What is the average atomic mass of Cesium with three common isotopes: 75.0% 133Cs with a mass of 132.97 g/mol, 20.0% 132Cs with a mass of 131.98 g/mol, and 5.00% 134Cs with a mass of 133.982 g/mol? Round to FOUR significant figures.
How many atoms are present in 415.7 g of manganese?
Include correct significant figures, unit, and element symbol in your final answer.
What is the mass of 6.83 moles of hydrogen?
Include correct significant figures, unit, and element symbol in your final answer.
Calculate the number of moles present in 365 g of beryllium.
Include correct significant figures, unit, and element symbol in your final answer.
How many atoms are present in 1.080 moles of gallium?
Include correct significant figures, unit, and element symbol in your final answer.
How many moles are present in 4.88x1024 atoms of aluminum?
Include correct significant figures, unit, and element symbol in your final answer.
What is the mass of 4.62x1022 atoms of cobalt?
Include correct significant figures, unit, and element symbol in your final answer.
Use a fraction to put mass number over atomic number before the element symbol.
Use a fraction to put mass number over atomic number before the element symbol.
Use a fraction to put mass number over atomic number before the element symbol.