Q2 PRE-TEST SCIENCE 9
Quiz by Aren Valerio
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Measures 6 skills fromGrade 9SciencePhilippines Curriculum: Grades K-10 (MELC)
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- Q1
1. The spin quantum number of an electron can be thoughtof as describing _______
the number of revolutions the electron makes about the nucleus per second
whether the electron's charge is positive or negative.
the direction of electron spin.
the electron's exact location in orbit.
30s - Q2
2. How many electrons from the outermost shell does a 4s orbital possess?
5
2
4
3
30s - Q3
3. 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 = +1
n = 2, l = 0, ml= 1, ms =+½
n = 2, l = 0, ml = 0, ms= +1
30s - Q4
4. What is the electron configuration for nitrogen, atomic number 7?
1s2 2s2 2p1
1s2 2s2 2p3
1s2 2s3 2p2
1s2 2s2 2p2 3s1
30s - Q5
5. Which of these d-orbitals contains both paired and unpaired electrons?
30s - Q6
6. How many valence electrons does Boron have?
two
four
one
three
30s - Q7
7. Covalent andionic bonding produce certain types of compounds that have different properties. What is the general term used for all the compounds with covalentbond?
compound
atom
molecule
none of the choices
30s - Q8
8. 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?
CH4
NaCl
O2
HCl
30s - Q9
9. 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-polarcovalent bond
polar covalent bond
covalent bond
ionicbond
30sS9MT-IIg-17 - Q10
10. 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?
sucrose (sugar)
dihydrogen monoxide (water)
sodium chloride (NaCl)
oxygen gas
30sS9MT-IIg-17 - Q11
11. 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-IIg-17 - Q12
12. Which best describes the position of the elements in the Periodic Table and its valence electrons?
All metalloids have the same valence electrons
Elements on the same family have the same valence electrons
Noble Gases elements have seven valence electrons
Elements on the same period have the same valence electrons
30sS9MT-IIg-17 - Q13
13. Which bestd escribes an anion?
It has more protons than electrons.
It has more electrons than protons.
It has a neutral charge.
It has more neutrons than protons.
30sS9MT-IIe-f-16 - Q14
14. How many electrons does Fluorine ion need for it to be stable?
2
3
4
1
30sS9MT-IIe-f-16 - Q15
15. What ion can be combined with oxygen ions to form an ionic compound?
Calcium ion
Fluorine ion
Chlorine ion
Carbon ion
30s
