Ludwig Review #2 Question Preview (ID: 30021)
Ludwig Chem Review 2.
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The lower the temperature of a same of water
a) the lower the kinetic energy of the sample
b) the lower the potential energy of the sample
c) the higher the kinetic energy of the sample
d) the higher the potential energy of the sample
Which can not broken down ?
a) a compound
b) a mixture
c) an element
d)
What occurs when a catalyst is added to a chemical reaction?
a) the alternate reaction pathway with a higher activation energy
b) the same reaction pathway with a higher activation energy
c) the same reaction pathway with a lower activation energy
d) the alternate reaction pathway with a lower activation energy
Hydrocarbon are
a) made up of carbon only
b) made up of carbon and hydrogen only
c) made up of carbon ,hydrogen and oxygen only
d) Sodium can combine with chlorine to produce a salt.
The joule is a unit of
a) a) concentration
b) b) pressure
c) c) energy
d) d) volume
In the ground state, an atom of which element has two valence electrons?
a) Cr
b) Ca
c) Na
d) Se
Isotopes of potassium-37 and an atom of potassium-42 differ in their total number of
a) a) electrons
b) b) protons
c) c) neutrons
d) d) positrons
What is the electron configuration of a sulfur atom in excited state?
a) a) 2-4
b) b) 2-8-6
c) c) 2-8-4
d) d) 2-7-7
Compared to a chlorine atom, a chlorine ion -1 has
a) larger radius
b) smaller radius
c)
d)
The nucleus of an atom has what charge ?
a) positive
b) neutral
c) negative
d)
Compared to a sodium atom, a sodium ion has
a) c) larger radius
b) b) smaller radius
c)
d)
What occurs in both fusion and fission reactions?
a) a)small amounts of matter are converted into large amounts of energy
b) b) Subtract its atomic number from the mass number.
c) c) large amounts of energy. C) Heavy nuclei are split into lighter nuclei
d) d) Light nuclei are combined into heavier nuclei.
What happens when electrons absobe energy?
a) a) Stay in the same energy level
b) b) Move to a lower energy level
c) c) Move randomly to a higher or a lower energy level
d) d) Move to a higher energy level
Which of the following is an empirical formula?
a) a) H2O2
b) b) N2O
c) c) C2H4
d) d) P4O10
Which phrase describes the charge and mass of a neutron
a) no charge, no mass
b) no charge, mass of 1 amu
c) charge of + 1, mass of 1 amu
d) high pressure and high temperature
NaCl + MgBr2 = NaBr + MgCl2
a) single replacement
b) double replacement
c) synthesis
d) 8
The nuclides C-12 and C-14 are classified as
a) a) ions of the same element
b) b) isotopes of the same element
c) c) ions of- N-14 - 0-16
d) d) isotopes of- N-14 - 0-16
What is the maximum number of electrons that can be in the 3rd shell?
a) 2
b) 8
c) 18
d) 32
Which has the most entropy
a) S
b) L
c) G
d) d) element
The elements on the Periodic Table are arranged in order of increasing
a) mass number
b) atomic number
c) number of isotopes
d) number of valence electrons
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