June 2017 Chemistry Regents Questions 1-10 Question Preview (ID: 59772)


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. Good Luck. TEACHERS: click here for quick copy question ID numbers.

Which statement describes the structure of an atom?
a) The nucleus contains positively charged electrons.
b) The nucleus contains negatively charged protons.
c) The nucleus has a positive charge and is surrounded by negatively charged electrons.
d) The nucleus has a negative charge and is surrounded by positively charged electrons.

Which term is defined as the region in an atom where an electron is most likely to be located?
a) nucleus
b) orbital
c) quanta
d) spectra

What is the number of electrons in an atom of scandium?
a) 21
b) 24
c) 45
d) 66

Which particle has the least mass?
a) a proton
b) an electron
c) a helium atom
d) a hydrogen atom

Which electron transition in an excited atom results in a release of energy?
a) first shell to the third shell
b) second shell to the fourth shell
c) third shell to the fourth shell
d) fourth shell to the second shell

On the Periodic Table, the number of protons in an atom of an element is indicated by its
a) atomic mass
b) atomic number
c) selected oxidation states
d) number of valence electrons

Which type of formula shows an element symbol for each atom and a line for each bond between atoms?
a) ionic
b) structural
c) empirical
d) molecular

What is conserved during all chemical reactions?
a) charge
b) density
c) vapor pressure
d) melting point

In which type of reaction can two compounds exchange ions to form two different compounds?
a) synthesis
b) decomposition
c) single replacement
d) double replacement

At STP, two 5.0-gram solid samples of different ionic compounds have the same density. These solid samples could be differentiated by their
a) mass
b) mass
c) temperature
d) solubility in water

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