periodic table ch2

Question 1

periodic table organized by :

Answer 1

Dmitri Mendeleev in 1869

dim eat re/man dill aiv

dm it ri / men dele ev

Question 2

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

Answer 2

112-118

Question 3

The horizontal rows are called _________

hohr zan till

horizintal

Answer 3

period

Question 4

The vertical columns are called ________

vir tik ill=راسي

vertical

Answer 4

groups

Question 5

The main categories of elements on the periodic table
are :

Answer 5

1-metal
2-nonmetal
3-semimetal

Question 6

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

Answer 6

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

Question 7

periodic table arranged based on _______

Answer 7

atomic weight or mass

Question 8

Two elements are liquids on the periodic table :

Answer 8

bromine (Br) and mercury (Hg).

Question 9

Elements that are gases include :

Answer 9

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

Are gone

Argon

Question 10

metal element

Answer 10

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

Question 11

Nonmetal

Answer 11

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

Question 12

semi-metal

Answer 12

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

Question 13

metal

Answer 13

substance whose atoms tend to lose electron

Question 14

nonmetal

Answer 14

substance whose atoms tend to gain electron

Question 15

metalloid

Answer 15

have properites intermediate between metal and nonmetal