August 2022 Chemistry Regents Questions 1-10 Question Preview (ID: 61269)


Use Your Knowledge Of Chemistry To Answer All Questions In The Data Set. You May 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.

What is the number of protons in an atom with the electron configuration of 2-5?
a) 5
b) 2
c) 3
d) 7

In the wave-mechanical model of an atom, an orbital is defined as
a) a region of the most probable neutron location
b) a region of the most probable electron location
c) the straight-line path of a neutron
d) the straight-line path of an electron

In the ground state, which shell of a potassium atom has an electron with the greatest amount of energy?
a) first
b) second
c) third
d) fourth

Which phrase describes two atoms that contain the same number of protons but a different number of neutrons?
a) ions of the same element
b) isotopes of the same element
c) a mixture of different elements
d) nuclides of different elements

All atoms of an element have the same
a) mass number
b) atomic mass
c) number of neutrons
d) number of protons

Which Group 15 element is classified as a metal?
a) N
b) P
c) As
d) Bi

Compared to the number of electron shells and radius of an aluminum atom in the ground state, a boron atom in the ground state has
a) fewer electron shells and a smaller radius
b) fewer electron shells and a larger radius
c) more electron shells and a smaller radius
d) more electron shells and a larger radius

Hydrogen sulfide, H2S, is classified as a
a) compound with atoms in a fixed proportion
b) compound with atoms in a proportion that can vary
c) mixture with atoms in a fixed proportion
d) mixture with atoms in a proportion that can vary

A structural formula differs from a molecular formula in that a structural formula shows the
a) arrangement of atoms
b) number of atoms
c) ratio of atoms
d) types of atoms

Which type of reaction occurs when a compound is separated into its elements?
a) synthesis
b) decomposition
c) single replacement
d) double replacement

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