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Gravity
Terms in this set (14)
How was the Periodic Table improved ?
by arranging elements according to increasing atomic number (number of protons).
Dmitri Mendeleev
- Russian scientist who is credited for developing a Periodic Table that can be used to predict the properties of elements
- He arranged elements according to increasing atomic mass.
He
2
Helium
4.003
Ne
10
Neon
20.18
Ar
18
Argon
Kr
36
Krypton
83.80
Xe
54
Xenon
131.29
Rn
86
Radon
Ex.) 1 Hydrogen 1.008......... What is 1.008?
atomic mass
colums
up & down
periods
left to right
Malleable
can be flattened & not shatter
Noble gasses areeeeee.....
unreactive
Electronegativity
How well an element can attract electrons
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