August 2023 Chemistry Regents 1-10 Question Preview (ID: 62038)


The Questions In This Practice Exam Are Thoughtfully Crafted To Assess Your Knowledge And Skills. They Cover A Range Of Topics And Formats, Offering A Valuable Opportunity For Self-assessment And Preparation. TEACHERS: click here for quick copy question ID numbers.

Which proposal in the development of the modern model of the atom was made before the others?
a) Atoms are hard, indivisible spheres of different sizes.
b) Atoms are mostly empty space with a small dense nucleus.
c) Atoms have electrons that have wavelike properties.
d) Atoms have an internal structure that contains negative particles.

According to the wave-mechanical model, in the ground state, the 10 electrons of a neon atom would be located
a) in the nucleus
b) in orbitals
c) in the first shell
d) in the valence shell

Which statement describes two different isotopes of carbon?
a) The isotopes contain the same number of neutrons and have the same atomic number.
b) The isotopes contain the same number of neutrons but have a different atomic number.
c) The isotopes contain a different number of neutrons but have the same atomic number.
d) The isotopes contain a different number of neutrons and have a different atomic number.

An element that is a very reactive metal could have an atomic number of
a) 9
b) 2
c) 19
d) 79

Which element is listed with the number of protons in each of its atoms?
a) nitrogen, 14
b) silicon, 14
c) oxygen, 16
d) phosphorus, 16

What is the overall charge on the nucleus of a fluorine atom?
a) -1
b) -9
c) +9
d) +19

As the elements with atomic numbers 11 through 17 are considered in order of increasing atomic number, the classification of the elements changes from
a) metal to metalloid to nonmetal
b) metal to nonmetal to metalloid
c) nonmetal to metalloid to metal
d) nonmetal to metal to metalloid

At STP, which property can be used to differentiate one-mole samples of Cl2(g) and Kr(g)?
a) phase
b) pressure
c) chemical reactivity
d) temperature

Two gaseous forms of oxygen are diatomic oxygen, O2, and ozone, O3. These two forms of oxygen have
a) the same molecular structure and the same properties
b) the same molecular structure and different properties
c) different molecular structures and the same properties
d) different molecular structures and different properties

A compound consists of two or more different elements that are
a) physically mixed in a fixed proportion
b) physically mixed in a proportion that can vary
c) chemically combined in a fixed proportion
d) chemically combined in a proportion that can vary

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