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WorksheetsAttempts of Elements classification
Total questions: 28
Worksheet time: 28mins
The nucleus of the atom contains.......
positive electrons
positive protons
negative electrons
negative protons
Each main energy level contains a definite number of energy
levels
periods
groups
Moseley put.........and........below the periodic table
inert gases - lanthanides
S_block - p_block
lanthanides - actinides
D_block - F_block
The transition elements start to appear from the beginning of the.........period
third
fifth
second
There is a question that says --Elements of D_block are arranged in......groups--
sally answered it --2--
mariam answered it --5--
malak answered it --6--
you answered it --10--
who answered it correct?
you
mariam
sally
malak
Nobel gases are located in group.......
12
6
17
Elements of group (6A) in the periodic table have the same number of
proton inside the nucleus
energy levels around the nucleus
neutrons inside the nucleus
electrons in the outermost energy levels
The number of electrons of period (4) is ......... the number of elements of elements of period (3)
equal to
less than
more than
half
The element whose atomic number (18) is
transition element
metalic element
halogen element
inert gas
Elements of the period in the modern periodic table have the number of........
protons inside the nucleus
atomic number
electrons in the outermost energy level
energy levels around the nucleus
The number of negative electrons in the atom in its normal state equals...
the number of protons
half the number neutrons
the number of neutrons
half the number of protons
The element which is located in period (3) and group (3A)
magnesium 12
aluminum 13
sodium 11
potassium 15
The atomic number of element that located in period (4) and group (2A) is
4
18
20
12
The atomic number of the element that exists in group (7A) and period (2) is
17
9
7
12
The element (X 12) is located in.....of the periodic table
period (2) and group (2A)
period 2 and group (3A)
period (3) and group (4A)
period (3) and group (2A)
The chemical elements have been categorized in a table to ease its study ( )
true
false ( correct )
Mandeleev arranged the elements descendingly according to their atomic weights ( )
true
false (correct)
Inert gases are located in zero group on the left side of periodic table ( )
True
False (correct)
The vertical columns in the modern periodic table
periods
groups
atomic number
elements
The first real periodic table for classifying elements
Mandeleev 's
Mosely 's
modern periodic table
Bohr 's
They are indicated by the letters K , L , M , N , O , P , Q
energy levels
energy sublevels
nucleus
Elements which appear from period (4) in the modern periodic table
OR
A kind of elements symbolized by letter (B)
D_block
S_block
P_block
transition elements
It indicates the number of energy levels , which are occupied by electrons in the atom of an element
period
group
atomic number
protons number
discovered the main energy levels
Madeleev
Mosely
Bohr
Rusherford
Number of elements of Mabdeleev's periodic table
76
118
92
67
number of blocks in the modern periodic table
4
10
5
6
number of groups in D_block
6
2
4
10
locate the following element
(Helium 2)
period=
group=
block=
period (1)
group (2A)
block (S)
period (1)
group (18)
block (P)
period (2)
group (18)
block (P)
period (1)
group (18)
block ( F)
