Chemistry Regents Jan 2020

Which statement describes a concept included in

the wave-mechanical model of the atom?

• Protons, neutrons, and electrons are located in the nucleus.

• Electrons orbit the nucleus in shells at fixed distances.

• Atoms are hard, indivisible spheres.

• Electrons are located in regions called orbitals.

As an electron in an atom moves from a higher

energy state to a lower energy state, the atom

• becomes a negative ion

• becomes a positive ion

• releases energy

• absorbs energy

Two atoms that are different isotopes of the same

element have

• the same number of protons and the same number of neutron

• the same number of protons but a different number of neutrons

• a different number of protons but the same number of neutron

• a different number of protons and a different number of neutrons

The element in Group 14, Period 3, of the

Periodic Table is classified as a

• metal

• noble gas

• metalloid

• nonmetal

Tags

NGSS.HS-PS1-1

Which element has chemical properties that are

most similar to potassium?

• calcium

• cesium

• nitrogen

• sulfur

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which element requires the least amount of

energy to remove the most loosely held electron

from a gaseous atom in the ground state?

• Na

• Ar

• P

• Cl

Tags

NGSS.HS-PS1-1

Which terms identify two different categories of

compounds?

• covalent and molecular

• covalent and empirical

• ionic and molecular

• ionic and empirical

Which statement describes the energy and

bonding changes as two atoms of fluorine become

a molecule of fluorine?

• Energy is absorbed as a bond is broken.

• Energy is absorbed as a bond is formed.

• Energy is released as a bond is broken.

• Energy is released as a bond is formed.

Tags

NGSS.HS-PS1-4

Which part of a calcium atom in the ground state

is represented by the dots in its Lewis electron dot

diagram?

• the electrons in the first shell

• the electrons in the fourth shell

• the protons in the nucleus

• the neutrons in the nucleus

Tags

NGSS.HS-PS1-1

Based on Table S, an atom of which element

has the strongest attraction for electrons in a

chemical bond?

• aluminum

• chlorine

• magnesium

• sulfur