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Periodic and Reactio

Periodic Table and Reactions

What is group 1 called? alkali metals
What is group 2 called? alkaline earth metals
What is group 3-12 called? Transition metals
What are the two rows below the Periodic table called? Lanthanide and actinide series
What is group 17 called? Halogens
What is group 18 called? Nobel gases
How many valence electrons are there in each group? Group 1=1, 2=2, 3-12=varies, 13=3, 14=4, 15=5, 16=6, 17=7, 18=8
Group direction vertical
Period direction horizontal
These types of elements are also called semiconductors. metalloids
What type of element makes up most of the periodic table metals
Endothermic reactions begin by taking in energy/heat
Exothermic reactions end by releasing heat/energy
Reactants are elements/compounds that chemically combine
Products are results of the reactants
A synthesis reaction occurs when two reactants make one product
A decomposition reaction occurs when one reactant makes two products
A combustion reaction occurs when carbon dioxide and water are products
A physical change does not change the chemical composition of the substance
Ions positively or negatively charged atoms.
What determines how an element reacts? valence electron number
Period number is the same as number of energy levels
Chemical reactions create new substances
What are the charges of all the subatomic particles? electrons-negative protons-positive neutrons-neutral
What is an element? A pure substance that cannot be broken down by chemical means.
Atomic number is the same as number of protons
Atomic mass number is found using the number of protons and neutrons
Balance this equation CH4 + O2 CO2 + 2 H2O
What is oxidation number? How many electrons an elements loses or gains in a chemical reaction.
What compound would sulfur (oxidation number of -2) and Lithium (oxidation number of +1) make? L2S
Created by: evroman