Q2-SCIENCE 9-SUMMATIVE-TEST-2021-2022
Quiz by Merced Ansay
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- Q1
Which statement is INCORRECT?
An electron can emit energy when it jumps to a higher energy level.
An electron can absorb energy when it jumps to a higher energy level.
Filling of electrons in an atom start from lower energy level to highest energy level.
Orbital is a region in an atom where an electron can be found.
30s - Q2
Which quantum number(s) do 2s and 2p orbitals have in common?
n
n and l
l and ml
l
30s - Q3
The element with electron configuration 1s2 2s2 2p6 3s2 3p2 is _______________.
Mg (Z =12)
S (Z =16)
C (Z =6)
Si (Z =14)
30s - Q4
The possible values of an electron's spin quantum number are
+1 /2 or− 1 /2
0 or 1
–1, 0, or 1
+1 or –1
30s - Q5
Which orbital shows a violation of Hund's Rules?
30s - Q6
If n is the principal quantum number of a main energy level, the number of electrons in that energy level is _________.
n
n2
2n2
2n
30s - Q7
A vertical column in the periodic table is called a:
period
branch
valence
group
30s - Q8
Which model shows the possibility of an electron to be discovered in several locations around the nucleus?
Dalton’s Atomic Model
Bohr’s Model
Quantum Mechanical Model
Uncertainty Principle
30s - Q9
Electrical and thermal conductivity is one of the properties of compounds. Which of the following types of bond will have a high electrical conductivity?
non-polar covalent bond
ionic bond
polar covalent bond
covalent bond
30s - Q10
In covalent bonding, electrons are shared between atoms or elements to attain stability. What do you call the particle/substance produced with covalent bond?
atom
compound
molecule
none of the choices
30s - Q11
Which of the following physical properties is TRUE to an ionic compound?
high melting point
low boiling point
poor conductor
low melting point
30s - Q12
The following compounds are commonly found in nature or in our household. Which of the following will have the highest melting temperature?
sodium chloride (NaCl)
sucrose (sugar)
dihydrogen monoxide (water)
oxygen gas
30s - Q13
Non-polar covalent bonding involves the equal sharing of electrons between atoms to attain stability. Which of the following compounds has a non-polar covalent bond?
HCl
O2
CH4
NaCl
30s - Q14
Which is TRUE to a compound with polar covalent bond?
electron is removed in an atom
electron is shared equally
electron is shared unequally
electron is transferred
30s - Q15
What happens to the electron of a metal element in ionic bonding forming a compound?
shared unequally with non-metal
shared to a non-metal
none of the choices
transferred to non-metal
30s
