ANSWERS ALL VERIFIED BY
AN EXPERT A+ GRADED
(LATEST UPDATE)
,Mass Number - ANS total number of neutrons and protons in an atom; # protons + # electrons
p - ANS Most nonmetallic elements are found in which block of the periodic table?
Positive matter is concentrated in the central core - ANS Ernest Rutherford disproved J.J.
Thomson's plum-pudding model of the atom by showing that...
Potassium - ANS Plants use up copious amounts of which alkali metal, preventing most of it
K
from being washed out to sea?
2:1:1:2 - ANS What is the ratio of reactants and products in the chemical equation?
C
__NaOH + __H2SO4 --> __Na2SO4 + __H2O
LO
the number of ATOMS in 12g of Carbon-12
1 g = 6.022 × 1023 amu - ANS What is Avogadro's number?
Mg - ANS What is the reducing agent in the following equation?
YC
Mg(s) + 2HCl(aq) -> MgCl2(aq) + H2(g)
(s) < (l) < (g) - ANS Which arrangement accurately describes the standard entropy values at
different phases?
2, 8, 20, 50, 82 or 126 protons - ANS What are the most stable isotopes?
D
S = oxidized
N = reduced - ANS What element has been oxidized and what element has been reduced?
U
3CuS + 8HNO3 --> 3CuSO4 + 8NO + 4H2O
ST
multiply the atomic mass (grams) by the number of moles - ANS How do you convert from
moles to grams?
Divide the total number of grams by the atomic mass (grams) of 1 mole - ANS How do you
convert from grams to moles?
Mass - ANS measure of the amount of matter
Compound - ANS made from atoms of 2+ elements that are chemically bonded; cannot be
separated into simpler substances by any physical process; can be separated by a chemical
reaction
, Solid - ANS Definite shape and volume
Doesn't conform to shape of container
Particles are very close together in orderly fashion with little freedom of motion
Liquid - ANS Definite volume, indefinite shape
Conforms to shape of the part of the container it fills
Particles are close together but not rigidly in position with freedom to move past each other
Gas - ANS No definite shape or volume
K
Conforms to shape and volume of container
Particles separated by distances very large compared to size of particles
C
Physical Property - ANS Color, melting point, boiling point
Observed and measured without changing identity of substance
LO
Chemical Property - ANS Observed by performing a chemical change
Mixture - ANS Combination of 2+ elements, each retains its identity and properties
Can be separated by physical means into pure components without changing identity of
compounds
YC
Pure Substance - ANS fixed composition and differs from a mixture (every sample has same
properties and composition)
Polyatomic Ion - ANS molecule with a charge
contain more than 1 atom chemically bonded together
D
ions - ANS atoms with charge formed by loss or gain of an electron
U
Cation - ANS positive ion, may have roman numeral
Anion - ANS negative ion, element ends in -ide
ST
isotope - ANS atom of an element that has a different mass because of a different number of
neutrons, but same atomic number
Atomic Number - ANS total number of protons in an atom; also indicates number of electrons
Catalyst - ANS additional reactant that increases the rate of a reaction with a lower activation
energy
Surface area
Concentration
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