Atomic Theory
Who theorized the modern structure of the atom?
Bohr
What is the definition of an atom?
Atoms are the basic units of matter.
What is Binding Energy?
Energy that creates a force keeping particles in place.
True Or False.
Isomers have the same chemical formula but different structures.
True
Who created the periodic table?
Mendeleev
Who first theorized that all matter was made up of tiny, indivisible atoms?
Democritus
What are atoms composed of?
protons, neutrons, and electrons
What letter represents the closest ring to the nucleus?
K
True or False.
isotopes have the same number of protons but different number of neutrons.
True.
What is the atomic number of tungsten?
74
Rutherford experimented radioactivity by bombarding a _________ sheet with alpha particles
gold sheet
Rutherford discovered particles would go through the gold sheet and bounce off in several different directions. This theorized all atoms have holes in them.
If there are more electrons than protons what charge will the atom have?
Negative charge
Why is binding energy necessary in the nucleus of an atom?
it holds the protons and the neutrons together
What is Isotones?
the same number of neutrons but a different number of protons
What makes up the atomic number?
Number of protons in the nucleus
Who compared the atomic structure to the solar system?
Rutherford
______ is the name of a negative atom and ________ is the name of a positive atom
Anion and Cation
Why are electrons arranged in shells?
To keep them organized around the nucleus. Helps keeps the atom stable.
What is Isobars?
a different number of protons but the same total number of protons and neutrons
What element found in the focusing cup of the x-ray tube helps compress the electron beam?
Nickel
What are the ingredients to the “plum pudding model” proposed by JJ Thomson?
Pudding base is the Protons, the raisins are the electrons embedded inside
What makes up the majority of the mass of an atom?
Nucleus
What is the difference between ionic & covalent bonds?
Ionic bonds give up an electron
Covalent share electrons similar to a figure 8 pattern
What is Isomers?
the same number of protons and neutrons but different amounts of energy within their nuclei
What are the elements that make up the anode?
Tungsten, Molybdenum, & graphite