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ScieGaling
Test Description: Mastery in Science
Instructions: Answer all questions to get your test result.
1) What kind of particles is produced after covalent bonding?
A
Electron
B
Ion
C
Atom
D
Molecule
2) When does covalent bonding takes place?
A
When atoms share electrons with one another.
B
When the attraction between atoms is strong.
C
When atoms collide with one another.
D
When atoms attain stability.
3) Who proposed the probability that electrons will be found in certain locations around the nucleus of an atom?
A
Ernest Rutherford
B
Neil Bohr
C
J.J. Thomson
D
Erwin Schrodinger
4) Which orbital designation has the highest enrrgy?
A
2s
B
3d
C
2p
D
4s
5) Which among the following shows that an atom is stable?
A
having 6 valence electrons
B
having 2 valence electrons
C
having 8 valence electrons
D
having 4 valence electrons
6) Which has the highest melting temperature?
A
parrafin wax (candle wax)
B
sodium chloride (salt)
C
sucrose (table sugar)
D
lead wire
7) Nitrogen (N) belongs to family 5A and it is diatomic. How many nonpolar covalent bonds will there be in N2 molecules?
A
4
B
2
C
3
D
1
8) H2O (Water) is an example of.
A
mixture
B
element
C
compound
D
pure substance
9) When an atom gains or loses electrons, it is called an.
A
isoion
B
element
C
isotope
D
ion
10) What are the three particals of an atoms called?
A
eletrons, protons, molecules
B
protons, neutrons, electrons
C
ions, neutrons, electrons
D
protons, electrons, isotopes
*select an answer for all questions
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