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ESAS 3
What are the rows in periodic table called?
Who discovered proton?
ESAS 3
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1
Who discovered proton?
Joseph John Thomson
Earnest Rutherford
John Dalton
James Chadwick
2
What are the rows in periodic table called?
Groups
Families
Transitions
Periods
3
The elements with similar properties are placed in column of the periodic table. The columns are commonly called?
Groups or families
Families
Periods
Groups
4
What element is commonly used in making lasers?
Neodymium
Promethium
Chromium
Terbium
5
Who proposed a plum-pudding (raisin bread) model of an atom?
John Joseph Thomson
Earnest Rutherford
John Dalton
Robert Andrews Millikan
6
What is the chemical formula for laughing gas?
NO3
N2O5
NO2
N2O
7
The elements in group in the periodic table are called?
Affinities
Representatives
Families
Cogeners
8
What bond is involved in bronze the alloy of copper and tin?
Ionic bond
Covalent bond
Van der Waals
Metallic bond
9
Elements in group II A in periodic table are called?
Alkali metals
Carbon group
Alkaline earth metals
Boron group
10
Approximately, what percent of elements in the periodic table are metals?
70%
80%
90%
60%
11
It is a substancr which when added to reacting mixture increase the rate of reaction but remains unchanged?
Catalyst
Inhibitors
Accelerators
Neutral substance
12
What is the opposite to alkali?
Oxide
Acid
Carbon
Fluid
13
It is the electrostatic attraction that holds togethet the oppositely charge ions in the solid compound?
Covalent bond
Metallic bind
Ionic bond
Electronic bond
14
Which of the ff organic chemicals is most soluble in water??
CH3OH, methanol
C2H6, ethane
CCI4, carbon tetrachloride
CH4, methane
15
What element is used as electric power source for pacemajers and artificial hearts?
Plutonium
Uranium
Neodymium
Promethium
16
The condition of liquid eletrolyte is measured in terms of?
Voltage output
Specific gravity
Current value
Acid content
17
What is the chemical formula for nitric acid?
HNO3
H2NO2
HNO2
H2NO3
18
What forces hold molecules together in crystals?
Diffusive forces
Ionic forces
Cohesive forces
Van der Waals forces
19
What is the chemical formula for aluminum nitride?
AlN2
Al2N
Al2N2
AlN
20
What is the chemical formula for dinitrogen pentoxide?
N2O5
N5O
NO5
N5O2
21
What is formed by sharing electrons between atoms?
Electronic bond
Covalent bond
Metallic bond
Ionic bond
22
What is the chemical formula for Magnesium Nitrite?
Mg(NO2)2
Mg(NO3)2
Mg2NO3
Mg2NO2
23
What is the chemical formula for calcium chloride?
CaCl3
Ca2Cl
CaCl
CaCl2
24
Who discovered the neutron?
Joseph John Thomson
John Dalton
James Chadwick
Earnest Rutherford
25
Who discovered radioactivity?
Henri Becquerel
Puerre Curie
Marie Curie
Niels Bohr
26
Who is the father of modern chemistry?
John Dalton
Robert Boyle
Antoine Lavoisier
Aristotle
27
What is the chemical formula foe magnesium hydroxide (a laxative)?
MgOH2
Mg(OH)2
Mg2(OH)
Mg(OH)3
28
Who formulated the atomic theory?
Ernest Rutherford
Henri Becquerel
Humphrey Davy
John Dalton
29
Who discovered electron
James Chadwick
Ernest Rutherford
Joseph John Thomson
John Dalton
30
Elements in group I A in the periodic table are called?
Boron group
Alkali metals
Carbon group
Alkaline earth metals
