January 2020 Chemistry Regents Questions 1-10 Question Preview (ID: 59696)


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 part of a calcium atom in the ground state is represented by the dots in its Lewis electron-dot diagram?
a) the electrons in the first shell
b) the electrons in the fourth shell
c) the protons in the nucleus
d) the neutrons in the nucleus

Which statement describes the energy and bonding changes as two atoms of fluorine become a molecule of fluorine?
a) Energy is absorbed as a bond is broken.
b) Energy is absorbed as a bond is formed.
c) Energy is released as a bond is broken.
d) Energy is released as a bond is formed.

Which terms identify two different categories of compounds?
a) covalent and molecular
b) covalent and empirical
c) ionic and molecular
d) ionic and empirical

Which element requires the least amount of energy to remove the most loosely held electron from a gaseous atom in the ground state?
a) Na
b) Ar
c) P
d) Cl

Which element has chemical properties that are most similar to potassium?
a) calcium
b) cesium
c) nitrogen
d) sulfur

The element in Group 14, Period 3, of the Periodic Table is classified as a
a) metal
b) noble gas
c) metalloid
d) nonmetal

Two atoms that are different isotopes of the same element have
a) the same number of protons and the same number of neutrons
b) the same number of protons but a different number of neutrons
c) a different number of protons but the same number of neutrons
d) a different number of protons and a different number of neutrons

As an electron in an atom moves from a higher energy state to a lower energy state, the atom
a) becomes a negative ion
b) becomes a positive ion
c) releases energy
d) absorbs energy

Which statement describes a concept included in the wave-mechanical model of the atom?
a) Protons, neutrons, and electrons are located in the nucleus.
b) Electrons orbit the nucleus in shells at fixed distances.
c) Atoms are hard, indivisible spheres.
d) Electrons are located in regions called orbitals.

Based on Table S, an atom of which element has the strongest attraction for electrons in a chemical bond?
a) aluminum
b) chlorine
c) magnesium
d) sulfur

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