PRE-TEST_SCIENCE_GRADE9
Quiz by Carlo Dela Cruz
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- Q1
The spin quantum number of an electron can be thought of as describing _______
whether the electron's charge is positive or negative.
the electron's exact location in orbit.
the number of revolutions the electron makes about the nucleus per second
the direction of electron spin.
30s - Q2
How many electrons from the outermost shell does a 4s orbital possess?
3
4
5
2
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 = 0, ms = +½
n = 2, l = 0, ml = 1, ms = +½
n = 2, l = 0, ml = 1, ms = +1
n = 2, l = 0, ml = 0, ms = +1
30s - Q4
What is the electron configuration for nitrogen, atomic number 7?
1s22s3 2p2
1s2 2s2 2p2 3s1
1s22s2 2p3
1s22s2 2p1
30s - Q5
Which of these d-orbitals contains both paired and unpaired electrons?
30s - Q6
How many valence electrons does Boron have?
1
2
3
4
30s - Q7
Covalent and ionic bonding produce certain types of compounds that have different properties. What is the general term used for all the compounds with covalent bond?
none of the choices
atom
compound
molecule
30sS9MT-IIe-f-16 - Q8
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
CH4
NaCl
O2
30sS9MT-IIe-f-16 - Q9
Electrical and thermal conductivity is one of the properties of compounds. Which of the following types of bonds will have a high electrical conductivity?
non-polar covalent bond
covalent bond
polar covalent bond
ionic bond
30sS9MT-IIe-f-16 - Q10
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)
sodium chloride(NaCl)
sucrose (sugar)
dihydrogen monoxide (water)
30sS9MT-IIe-f-16 - Q11
What happens to the electron of a metal element in ionic bonding forming a compound?
none of the choices
shared unequally with non-metal
transferred to non-metal
shared to a non-metal
30sS9MT-IIe-f-16 - Q12
Which best describes the position of the elements in the Periodic Table and its valence electrons?
Elements on the same family have the same valence electrons
Noble Gases elements haveseven valence electrons
All metalloids have the samevalence electrons
Elements on the same period have the same valence electrons
30sS9MT-IIe-f-16 - Q13
Which best describes an anion?
It has a neutral charge.
It has more electrons than protons.
It has more protons than electrons.
It has more neutrons than protons.
30sS9MT-IIe-f-16 - Q14
How many electrons does Fluorine ion need for it to be stable?
3
1
4
2
30sS9MT-IIe-f-16 - Q15
What ion can be combined with oxygen ions to form an ionic compound?
Carbon ion
Calcium ion
Chlorine ion
Fluorine ion
30sS9MT-IIe-f-16
