August 2017 Chemistry Regents Questions 1-10 Question Preview (ID: 59760)
Use Your Knowledge Of Chemistry To Answer All Questions In The Data Set. You Will Need Your Chemistry Reference Tables And A Calculator To Answer Some Of The Questions.
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Which phrase describes an Al atom?
a) a negatively charged nucleus, surrounded by negatively charged electrons
b) a negatively charged nucleus, surrounded by positively charged electrons
c) a positively charged nucleus, surrounded by negatively charged electrons
d) a positively charged nucleus, surrounded by positively charged electrons
What is the number of electrons in an atom that has 20 protons and 17 neutrons?
a) 37
b) 20
c) 3
d) 17
The mass of a proton is approximately equal to the mass of
a) an electron
b) a neutron
c) an alpha particle
d) a beta particle
When a sample of CO2(s) becomes CO2(g), there is a change in
a) bond type
b) gram-formula mass
c) molecular polarity
d) particle arrangement
Which properties are characteristic of Group 2 elements at STP?
a) good electrical conductivity and electro-negativities less than 1.7
b) good electrical conductivity and electro-negativities greater than 1.7
c) poor electrical conductivity and electro-negativities less than 1.7
d) poor electrical conductivity and electro-negativities greater than 1.7
Compared to an atom of C-12, an atom of C-14 has a greater
a) number of electrons
b) number of protons
c) atomic number
d) mass number
Elements that have atoms with stable valence electron configurations in the ground state are found in
a) Group 1
b) Group 8
c) Group 11
d) Group 18
A magnesium atom that loses two electrons becomes a
a) positive ion with a smaller radius
b) negative ion with a smaller radius
c) positive ion with a larger radius
d) negative ion with a larger radius
An atom of which element has the strongest attraction for the electrons in a bond?
a) aluminum
b) carbon
c) chlorine
d) lithium
Which type of matter can not be broken down into simpler substances by a chemical change?
a) an element
b) a solution
c) a mixture
d) a compound
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