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Chemistry Part 2

The metals are to the ___________ of the stair step. left
The nonmetals are to the ___________ of the stair step. right
In general, when a metal bonds with a nonmetal, it forms what type of bond? ionic
In general, when a nonmetal bonds with a nonmetal, it forms what type of bond? covalent
If you have both, metal bonding with nonmetal and nonmetal bonding with metal, it forms what type of bond? polyatomic ion
What do families or groups tell us about the element? The number of valence electrons
What are valence electrons? The number of electrons in the outer shell
What do periods tell us about the element? The number of shells
Where are families or groups on the periodic table? Columns
Where are the periods located on the periodic table? Rows
What is a covalent bond? when atoms share electrons
What is an ionic bond? a bond that is created from the transfer of one or more electrons from one atom over to the next atom
What is a polyatomic ion bond? A compound that has both ionic and covalent bonds
Why are noble gases nonreactive? They are stable.
What does the atom need in order for it to be stable? a full outer shell
Know how to identify the number of elements in a compound. count the number of capital letters
Know how to identify the number of atoms in a compound. refer to page 47 and 59
Know how to write formulas Remember that + means the element wants to give an electron(s) and - means the element wants to take an electron(s) refer to page 67
The Halogen is really reactive to what other family? Explain. The halogen family is reactive with the alkali metals. This is because the Halogen family wants to take an electron and the Alkali metals want to give an electron.
What is always true about chemical changes? Something new is being formed by bonds being formed or broken.
What are clues to a chemical change? (1) Drastic color change (2) Gas given off (3) Precipitate formed (4) Energy change
What does exothermic mean? chemicals warming
What does endothermic mean? chemicals cooling
Be able to draw a model of an atom using Bohr's model refer to page 50-51
How many electrons can the first shell hold? second shell? third shell? The first shell can hold 2 electrons, the second shell can hold 8 electrons, and the third shell can hold 8 electrons. Remember that an element can have more shells, but we are only looking at those that have up to three shells.
Created by: kallayj



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