Science 9 Q2 Summative Test / Post Test
Quiz by Mary Grace Masongsong
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- Q1
The spin quantum number of an electron can be thought of as describing
the direction of electron spin.
the electron's exact location in orbit
whether the electron's charge is positive or negative.
the number of revolutions the electron makes about the nucleus per second
30s - Q2
How many electrons from the outermost shell does a 4s orbital possess?
3
5
2
4
30s - Q3
Which set of quantum numbers uniquely defines one of the electrons in an atomic orbital with n = 2 and l = 0?
n = 2, l = 0, ml = 1, ms = +1
n = 2, l = 0, ml = 1, ms = +½
n = 2, l = 0, ml = 0, ms = +1
n = 2, l = 0, ml = 0, ms = +½
30s - Q4
What is the electron configuration for nitrogen, atomic number 7?
1s22s2 2p1
1s22s2 2p2 3s1
1s22s2 2p3
1s22s3 2p2
30s - Q5
Which of these d-orbitals contains both paired and unpaired electrons?
30s - Q6
Boron belongs to Group 13. How many valence electrons does Boron have?
one
three
two
four
30s - Q7
Non-polar covalent bonding involves the equal sharing of electrons between atoms to attain stability. Which of the following compounds will have non-polar covalent bonding?
HCl
O2
NaCl
CH4
30s - Q8
Electrical and thermal conductivity is one of the properties of compounds. Which of the following types of bonds will have a high electrical conductivity?
polar covalent bond
non-polarcovalent bond
ionic bond
covalent bond
30s - Q9
The following compounds are commonly found in nature or in our household. Which do you think will have the highest melting/boiling point if we are to subject those substances to heating?
sodium chloride(NaCl)
oxygen gas
sucrose (sugar)
dihydrogen monoxide(water)
30s - Q10
What happens to the electron of a metal element in ionic bonding forming a compound?
none of the choices
shared unequally with non-metal
shared to a non-metal
transferred to non-metal
30s - Q11
Which best describes the position of the elements in the Periodic Table and its valence electrons?
Noble Gases elements have seven valence electrons
Elements on the same family or group have the same valence electrons
Elements on the same period have the same valence electrons
All metalloids have the same valence electrons
30s - Q12
Which best describes an anion?
It has a neutral charge.
It has more neutrons than protons.
It has more electrons than protons.
It has more protons than electrons.
30s - Q13
Fluorine belongs to Group 17 or halogens. How many electrons does a Fluorine ion need for it to be stable?
2
1
4
3
30s - Q14
What can be combined with oxygen ions to form an ionic compound?
Carbon ion
Fluorine ion
Calcium ion
Chlorine ion
30s - Q15
Which of the following ions is a monoatomic ion?
CN–
NH4+
Co2+
Cr2O72–
30s
