periodic table ch2 Flashcards
periodic table organized by :
Dmitri Mendeleev in 1869
dim eat re/man dill aiv
dm it ri / men dele ev
The newest elements which were identified a few years
ago are elements :
112-118
The horizontal rows are called _________
hohr zan till
horizintal
period
The vertical columns are called ________
vir tik ill=راسي
vertical
groups
The main categories of elements on the periodic table
are :
1-metal
2-nonmetal
3-semimetal
Older labeling of the periodic table used________ for the representative elements
and_______ for the transition
metal elements
1- 1A-8A
2-1B-8B
periodic table arranged based on _______
atomic weight or mass
Two elements are liquids on the periodic table :
bromine (Br) and mercury (Hg).
Elements that are gases include :
Hydrogen, Helium, Neon, Argon, Krypton, Xenon, Radon, Fluorine, Chlorine, nitrogen and oxygen
Are gone
Argon
metal element
1-all group one but Hydrogen
2-all group 2
3-all group 3 but boron
4-Sn and Pb in group 4
5-Bi
Nonmetal
1-Hydrogen
4-Carbon
5-Nitrogen , Phosphorus
6-Oxygen , Sulful s , Se selenium
7-all except At
8-all
semi-metal
3-Boron
4-SI and ge
5-As and Sb
6-Te and Po
7-At
metal
substance whose atoms tend to lose electron
nonmetal
substance whose atoms tend to gain electron
metalloid
have properites intermediate between metal and nonmetal