NEW
Font size
WorksheetsSCIENCE 9-Del Pilar
Total questions: 28
Worksheet time: 33mins
Who among the different scientists creates the said atomic model?
Neil Bohr
John Daltom
J.J. Thompson
Ernest Rutherford
In this atomic model the nucleus is made up of the following subatomic particles.
Electron and Neutron
Electron and Proton
Neutron and Proton
Proton, Neutron and electrons
Which of the following is the incorrect Lewis Structure of a noble gas
Argon = Ar with 8 dots around
Helium = He with 8 dots around
Neon = Ne with 8 dots around
Xenon = Xe with 8 dots around
The first in the 3 ways of chemical bond is called ?
Covalent bond
Ionic Bond
Metallic Bond
None of these
Applying the bonding through sharing of electrons which single element will be pair with Chlorine (Cl) to achieve stability
Boron
Carbon
Hydrogen
Oxygen
Unfortunately, the man is wounded and alone in the island which among the 4 substance he will used to disinfect the wound?
Acetone
Gasoline
Liquor
Water
As the time passes by and the night approaches, which among the 4 substances is best to use to create fire?
Acetone
Gasoline
Liquor
Water
Which pair is the correct example and classes of organic compounds?
I. Acetone : Hydrocarbons
II. Gasoline : Hydrocarbons
III. Liquor : Alcohol
I and II are correct
I and III are correct
II and III are correct
I, II and III are all correct
Using your periodic table, give molar mass of Carbon Dioxide (CO2)
3 g/mole
28 g/mole
44 g/mole
192 g/mole
What is the number of moles in 100 grams of Carbon Dioxide?
0.52 mole
2.27 moles
3.57 moles
33.33 moles
What is the number of particles of 100 grams of carbon dioxide?
3.13 x 10^23 particles
13.67 x 10^23 particles
21.49 x 10 ^23 particles
200 x 10^23 particles
Calcium (Ca2+) is an example of ?
Anion
Cation
This means Calcium (Ca2+) have ?
18 electrons and 20 protons
20 electrons and 18 protons
20 electrons and 20 protons
20 electrons and 22 protons
By applying the concept in water (H2O), what is the percentage by mass of the element hydrogen in water?
5.5 %
66.6 %
50%
11 %
And the percentage of oxygen in water (H2O)?
33.3 %
50 %
89 %
94.5 %
Electrons around the nucleus carries fixed amount of energy does not lose energy as long as it stay in its orbit. The fixed amount of energy is called energy level but if the electron receive enough energy it can jump into _ energy level.
higher
lower
stay in the same energy level
1s2, 2s2, 2p4 is the electron configuration of which element?
Carbon
Hydrogen
Nitrogen
Oxygen
In an electron Configuration (1s2) the (s) means ?
Energy Level
Number of electrons in an orbit
Type of orbitals
Among the 3 types of chemical bond, which is the best conductor of electricity?
Covalent Bond
Ionic Bond
Metallic Bond
Salt (NaCl) is an example of which chemical bond?
Covalent bond
Ionic Bond
Metallic Bond
Why do atoms react with one another to form chemical bonds?
To attain stability
To form compounds
A gasoline boy was scolded by his manager by smoking in the vicinity of the gasoline station. Why do you think the manager scolded his employee?
Because gasoline is flammable
Because gasoline is volatile
Because gasoline is viscous
all of the above
(C2H4) is a hydrocarbon belong to _ ?
Alkanes
Alkenes
Alkynes
Not hydrocarbons
An organic compound that is used by embalmers in treating human cadavers
Acetic Acid
Acetone
Formaldehyde
Methyl alcohol
Methane (CH4) is a component of natural gas. What is the common used of methane?
Cleaning Agent
Disinfectant
Fuel
Medicine
Which among the following is alcohol
C2H4
CHO
C3H6O
C2H6O
How many particles are there in 1 mole of any substance?
1
6.02 x 10^23
dependent on the element forming the substance
How can knowledge about moles be useful for environmentalist?
It gives information on the dangerous pollutants in the atmosphere
Mole concept can be used in environmental monitoring
Mole concept can be used in quantifying the amount of pollutant particle in the atmosphere
