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Chemistry - part 2 - targets 3, 6 (a,b,c) & 7 (a, b, c) (periodic table)

How did Mendeleev organize the periodic table? he lined up the known elements by atomic mass and noticed a repeating pattern of other chemical and physical properties. He placed thsoe elements in the same column (family).
What challenges did Mendeleev face when trying to organize the Periodic Table? He did not know all the elements that existed and some of the information for the elements was incorrect.
Describe the pattern within the periodic table for atomic number. increases by one as you move across a row (period).
Describe the pattern within the periodic table for atomic mass. increases as you move across a row/period.
Describe the pattern within the periodic table for a period. elements in a row increase in atomic number and mass
Describe the pattern within the periodic table for a family. share similar chemical and physical properties.
By looking at the periodic table, how can you determine the atomic number? It is the whole number
By looking at the periodic table, how can you determine the atomic mass? It is the decimal number
By looking at the periodic table, how can you determine the element symbol It is the largest letters
What is a period a row on the periodic table
what is a family a column on the periodic table
What is the atomic number for sodium? 11
What is the atomic mass for fluorine? 18.998
What is the chemical symbol for oxygen? O
Which element has an atomic number of 26? iron
Which element is in the same family as boron, aluminum or carbon? aluminum
which element is in the same period as chlorine? sulfur
Is potassium more like sodium or calcium? sodium - in same family
which element has only one proton? hyodrogen
which element has 10 protons? neon
What are the three parts of an atom? proton, neutron, electron
Where are the protons located? nucleus
Where are the neutrons located? nucleus
Where are the electrons located? moving around the nucleus
What is the charge of a proton? positive
What is the charge of a neutron? Neutral
What is the charge of an electron? negative
What makes one atom from one element different than an atom from a different element? (for example, one oxygen atom compared to a carbon atom) the number of protons in the nucleus
What is atomic number? number of protons
What are valence electrons? the most loosely held electrons (farthest from nucleus)
What give an atom its mass? protons + neutrons
What gives an atom its volume? electrons
What type of observations do we make on atoms? indirect observations
what is the pattern as you go across a period? metal --> metalloid --> nonmetal
Created by: camponel
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