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1) Answer: B) Perform the litmus paper test
on each liquid
Not the answers: A), C), D)
Because: A)> Physical propertie
C)>
Density
D)>
H2O present = aqueous
2) Answer: C) 2.8 g/ml
Not the answers: A), B), D)
Because: To find density you use the equation: D= M/V, in this case you FIRST
have to subtract: 19.4ml- 15.0ml then with then answer: 4.4ml which is your volume. Your mass is 12.32g, so fill in the Equation:
D= 12.32g/4.4ml, your answer is 2.8 g/ml.
3) Answer: D)This substance was formed by the reaction of oxygen gas and magnesium
Not the answers: A), B), C)
Because: A)> A lot of things have high densities
B)> Chemical Change
C)> Solubility
4) Answer: D) A pond freezes over
Not the answers: A), B), C)
Because: A)> Chemical Change
B)> Chemical Change
C)> Chemical Change
5) Answer: C) The number of neutrons
Not
the answers: A), B), D)
Because:
A)> Not affected by isotopes
B)>
Not affected by isotopes
D)> Not affected by isotopes
6)
Answer: C) Is it a compound because the mass has increased
Not the answers: A), B), D)
Because: A)> If mass increases it is a compound, NOT an element
B)> Colour change does not help e.g: Red hair, Red shirt etc.
D)> Colour change does not help e.g.: Red hair, Red shirt etc.
7) Answer: A) Water is formed from hydrogen gas and oxygen gas
Not the answers: B), C), D)
Because: B)> Electrons were discoverd by J.J. Thomson, he
came after Dalton
C)> The nucleus was discoverd by Ernest Rutherford, after Dalton
D)> Static Electricity was discovered by J.J. Thomson
8) Answer: B) 1 and 3
Not the answers: A), C), D)
Because: Element 1= Beryllium(Be) is the Alkaline
Earth Metals
Element
2= Sodium (Na) is the Alkali Metals
Element 3= Calcium (Ca) is the Alkali Metals
Element 4= Silicon (Si) is in group 4A (IVA)
9) Answer: B) All alkali metals react with water.
Not the answers: A), C), D)
Because: A) Halogens only have 7 valence electrons
C) The Elements in VIIA are the Noble/Inert gasses, they have a full last
electron shell (8 valence e-) therefore they do not react
D) Alkaline earth metals have two (2) electrons in their outer most shell
Periodic Table Test
1) Answer: C) Only
on the right side
Not the answers: A), B), D)
Because: Nonmetals are found only on the right
side of the Periodic Table of the elements.
2) Answer: C) 2
Not the answers: A), B), D)
Because: A) The last energy level contains 32 electrons
C) The third energy level contains 18 electrons
D) The second energy levels contains 8 electrons
3) Answer: B) Mendeleeve
Not the answers: A), C), D)
Because: A) Theory of the Atom
C) Atomic Model
D) Radiation research
4) Answer: D) Protons,
neutrons
Not the answers: A), B), C)
Because: A) Electrons move around the Atom
B) Electrons move around the Atom
C) Atoms are the particles
5) Answer: D) Alkali Metals
Not the answers: A), B), C)
Because: A) 7A group (F, Cl, Br, I, At)
B) 8A group (He, Ne, Ar, Kr, Xe, Ra)
C) 2A group (Be, Mg, Ca, Sr, Ba, Ra)
6) Answer: B) Noble/Inert Gasses
Not the answers: A), C), D)
Because: A) 2A group (Be, Mg, Ca, Sr, Ba, Ra)
C) 6A group (O, S, Se, Te, Po)
D) 1A group (H, Li, Na, K, Rb, Cs, Fr)
7) Answer: A) Lustrous, ductile, malleable
Not the answers: B), C), D)
Because: B) Properties of nonmetals
C) Properties of nonmetals
D) Nonmetals are on the right side of the table
8) Answer: D) Number
of electrons in last energy level
Not the answers: A), B), C)
Because: A) Dependant on the number of neutrons
B) Told by periods
C) Atomic mass Atomic number
9) Answer: C) Number
of energy levels
Not the answers: A), B), D)
Because: A) Not relevant
B) Told by groups
D) Electrons in last energy level
10) Answer: A) Without
cuts
Not the answers: B), C), D)
Because: B) Is a molecule
C) Not many pieces
D) Aristotles theory
Balancing Chemical Equations
Zn + 2HCl ==> ZnCl2 + H2
Cu + 2AgNO3 ==> Cu(NO3)2 + 2Ag
2Fe + 3Cl2 ==> 2FeCl3
2H2 + O2 ==> 2H2O
3Fe + 2O2 ==> Fe3O4
CaO + H2O ==> Ca(OH)2 Already Balanced!!
3Mg + 2P ==> Mg3P2
Na2O + H2O ==> 2NaOH
CoCO3 ==> CoO + CO2 Already Balanced!!
2K3N ==> 6K + N2
NaOH + HCl ==> NaCl + H2O Already Balanced!!
2CuS + 3O2 ==> 2CuO + 2SO2
2Bi + 3Cl2 ==> 2BiCl3
2Al + 6HCl ==> 2AlCl3 + 3H2
Al2(SO4)3 + 3BaCl2 ==>
3BaSO4 + 2AlCl3
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