Science Periodicity
Terms
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- What is the charge of a cation
- Positive
- Inverse Square Law
- Force is proportional to Q1 times Q2 over R squared
- Periodicity
- How the value of properties vary left to right in a period and top to bottom in a group
- Periodicity of electron affinity
- Left to right affinity increases because the amount of energy given off increases, Top to bottom it decreases
- Primary Ionization energy
- Amount of energy to remove first election from an atom. Ionization energy is proportional to atoms ENC
- Going left to right the ENC
- Increases
- Secondary Ionization energy
- Amount of energy required to remove the second electron. Greater value than primary
- Electronegativity
- Attraction that an atom has for other atoms electrons. Can be 0-4 zero is no attraction and 4 is greatest attraction
- Atomic Radius
- Distance from nucleus to an atoms outer electron
- As the magnitude of the charge or number of protons increases in the nucleus
- the force of attraction increases making a direct relationship
- As the distance between the nucleus and electrons decreases
- the force of attraction increases making an indirect relationship
- Metaliods
- Elements that border the stairstep line
- Q2
- Number of electrons
- Ionic Radius
- A way of compariting the physical size of ions. Compare the number of protons to the number of electrons
- Q1
- Number of protons
- Each period in the periodic table corresponds to
- a principal energy level
- Endothermic
- Energy is added
- 1. Effective Nuclear Charge
- How hard the nucleus pulls on the outermost electron
- R
- Distance between the nucleus and the electron your intrested in
- Isoelectronic
- Describes atoms with the same number of electrons
- Shielding
- The more electrons there are to hold on to, the more the strength of the nucleus gets diffused
- Periodicity of Electronegativity
- As the nucleus gets stronger, so does the electronegativity
- Homonuclear Diatomic Molecule
- How we measure atomic radius with 2 of the same atoms attached together
- Metalic Properties
- Conducts electricity, silver white or grey, conducts heat, is shiny, can be made into sheets and stretched
- Non Metals take on ____ when they react
- electrons
- Nonmetalic properties
- Comes in all colors, insulates heat and electricity
- Electron affinity
- The energy given off when an electron is added to an atom exothermic reaction
- Going top to bottom the ENC...
- Decreases because there is an increase in distance
- Person who made the first periodic table
- Dmitri Mendeleev
- Exothermic
- Energy is released
- A Metal gives up ____ when it reacts
- electrons
- Weak nuclei are on the ______ Strong nuclei are on the ______
- Left, Right