The "up" and "down" arrows in electron orbital notation depict
1) Protons & electrons 2) protons & neutrons 3) Electrons & neutrons
4) electrons with opposite spins 5) electrons with opposite charges
4) electrons with opposite spins
100
Which one is correct prefix for 7?
1)Hexa 2)Hepta 3)Nona 4)Deca 5)Penta
Neutral Oxygen atom has 8 protons and 8 electrons. If an oxygen atom gain 2 more electrons, the charge of oxygen ion will be
1) +2 2) 0 3) -2 4)-10 5) +8
3) -2
100
What will you get when you add the coefficient of AgI and NaI?
___ AgI + ___ Na2S → ___ Ag2S + ___ NaI
4
200
What neutral atom is represented by this configuration: 1s2, 2s2, 2p4?
1) Copper 2) Nitrogen 3) Carbon 4) Fluorine 5) Oxygen
3) Carbon
200
Which one is correct name for CO?
1) Carbon monoxide 2) Monocarbon monoxide 3) Carbon oxide
4) Monocarbon oxide 5) Carbon monooxide
1) Carbon monoxide
200
What is the reaction type of this chemical reaction?
2AgNO3 + Cu → Cu(NO3)2 + 2Ag
1) Combination 2) Decomposition 3) Single-replacement
4) Combustion 5) Double-replacement
3) Single-replacement
200
What is name of KCl?
Potassium chloride
200
What will you get when you multiply the coefficient of CH4 and H2O?
__CH4 + __ O2 → __CO2 + __ H2O
2
300
What is correct electron notation for neutral Sodium?
1) 1s2, 2s2, 2p5 2) 1s2, 2s2, 2p4,3s1
3) 1s2, 2s2, 2p6,3s1 4) 1s2, 2s1, 2p7,3s1
5) 1s2, 2s2, 2p5,3s2
3) 1s2, 2s2, 2p6,3s1
300
Which one is correct formula for Nitrogen trihydride?
1) NH3 2) N3H 3) 3NH 4)N(OH)3 5) NH
1) NH3
300
Which one is wrong about Entropy?
1) Entropy is a measure of disorder of a system.
2) The preferred direction in nature is toward zero entropy.
3) The preferred direction in nature is toward maximum entropy.
4) H2O (g) has higher entropy than H2O (s).
5) After cleaning my room, the entropy of my room is decreased.
2) The preferred direction in nature is toward zero entropy.
300
What is the 5 different types of reaction?
Synthesis, Decomposition, Single replacement, Double replacement, Combustion.
300
What will you get when you add the coefficient of P4 and O2?
__P4 + __ O2 → ___P2O5
6
400
Which one is correct name for CaCl2?
1) Calcium chloride(ii) 2)Calcium dichloride 3)Calcium chloride
4) Calcium(ii) chloride 5)Calcium dichlorine
3)Calcium chloride
400
Read sentence in the box. Choose the correct one from each one.
“If the difference of electronegativity between 2 different nonmetal element is less than (0, 0.4, 1.4), that will be (polar, non-polar) covalent bond.”
0.4, non-polar
400
Which one is right about Enthalpy?
1) Enthalpy is a measure of order of a system.
2) During endothermic process, they release heat.
3) During exothermic process, they absorb heat.
4) Freezing is as example of endothermic process.
5) Symbol of Enthalpy is H.
5) Symbol of Enthalpy is H.
400
What did u learn during 1st semester with Ms.Lee?
Chemistry
400
What will you get when you add all coefficients in the equation?
__Na + __ Cl2 → ___NaCl
5
500
Aluminum ion (Al3+) and Oxide (O2-) will form Aluminum oxide. Which one is correct formula for Aluminum Oxide?
1) AlO 2)Al3O 3)AlO2 4)Al2O3 5)Al3O2
4)Al2O3
500
Read sentence in the box. Choose the correct one from each one.
“In a molecule as you decrease the number of electrons shared between two atoms, the bond order will (decrease/increase), the strength of the bond will (increase/decrease), and the distance between two atoms (decrease/increase).”
decrease, decrease, increase
500
Which reaction is synthesis reaction?
1) 8 Fe + S8 ---> 8FeS
2) 2 H2O ---> 2 H2 + O2
3) CH4 + 2O2 ---> CO2 + 2H2O
4) Pb(NO3)2 + 2 KI ---> PbI2 + 2 KNO3
5) Mg + 2 H2O ---> Mg(OH)2 + H2
1) 8 Fe + S8 ---> 8FeS
500
What is Ms.Lee's name?
Sujin
500
What will you get when you multiply all coefficient in the equation ?
__H2 + __ O2 → ___H2O