August 2024 Chemistry Regents Questions 1-10 Question Preview (ID: 63414)


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 two particles each have a mass approximately equal to one atomic mass unit?
a) positron and electron
b) positron and neutron
c) proton and electron
d) proton and neutron

As the electron in a hydrogen atom gains energy and moves from the first shell to the third shell, the hydrogen atom becomes an
a) atom in an excited state
b) atom in the ground state
c) ion in an excited state
d) ion in the ground state

Which phrase describes the protons and neutrons in atoms of two different isotopes of the same element?
a) the same number of protons and the same number of neutrons
b) the same number of protons and a different number of neutrons
c) a different number of protons and the same number of neutrons
d) a different number of protons and a different number of neutrons

Which phrase compares the properties and molecular structure of oxygen, O2(g), and ozone, O3(g)?
a) the same properties and the same molecular structure
b) the same properties and different molecular structures
c) different properties and the same molecular structure
d) different properties and different molecular structures

Which phrase describes the composition of a compound?
a) different elements physically combined
b) different elements chemically combined
c) the same element physically combined
d) the same element chemically combined

Which quantity is conserved during all chemical reactions?
a) density
b) molecules
c) charge
d) temperature

At STP, a 5.0-gram sample of which substance contains metallic bonds?
a) CO
b) Fe
c) KI
d) Ne

When a cesium atom becomes a positive ion, there is a change in electron configuration and radius. Which statement describes this change?
a) The atom gains an electron, and the radius increases.
b) The atom gains an electron, and the radius decreases.
c) The atom loses an electron, and the radius increases.
d) The atom loses an electron, and the radius decreases

Given the equation representing a reaction: F + F → F2. Which statement describes the changes that occur during this reaction?
a) A bond is formed as energy is absorbed.
b) A bond is formed as energy is released.
c) A bond is broken as energy is absorbed.
d) A bond is broken as energy is released.

Which atom, in the ground state, has a stable valence electron configuration?
a) Bi
b) Cs
c) Pb
d) Rn

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