periodic table ch2 Flashcards

1
Q

periodic table organized by :

A

Dmitri Mendeleev in 1869

dim eat re/man dill aiv

dm it ri / men dele ev

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2
Q

The newest elements which were identified a few years
ago are elements :

A

112-118

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3
Q

The horizontal rows are called _________

hohr zan till

horizintal

A

period

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4
Q

The vertical columns are called ________

vir tik ill=راسي

vertical

A

groups

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5
Q

The main categories of elements on the periodic table
are :

A

1-metal
2-nonmetal
3-semimetal

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6
Q

Older labeling of the periodic table used________ for the representative elements
and_______ for the transition
metal elements

A

1- 1A-8A
2-1B-8B

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7
Q

periodic table arranged based on _______

A

atomic weight or mass

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8
Q

Two elements are liquids on the periodic table :

A

bromine (Br) and mercury (Hg).

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9
Q

Elements that are gases include :

A

Hydrogen, Helium, Neon, Argon, Krypton, Xenon, Radon, Fluorine, Chlorine, nitrogen and oxygen

Are gone

Argon

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10
Q

metal element

A

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

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11
Q

Nonmetal

A

1-Hydrogen
4-Carbon
5-Nitrogen , Phosphorus
6-Oxygen , Sulful s , Se selenium
7-all except At
8-all

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12
Q

semi-metal

A

3-Boron
4-SI and ge
5-As and Sb
6-Te and Po
7-At

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13
Q

metal

A

substance whose atoms tend to lose electron

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14
Q

nonmetal

A

substance whose atoms tend to gain electron

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15
Q

metalloid

A

have properites intermediate between metal and nonmetal

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16
Q
A