Chemistry Study Guide

Electron dot diagrams show _______ and can be used to predict if an atom will gain, lose, or share electrons in bonding.

• valence electrons

• atomic number

• protons

• neutrons

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

In forming compounds, atoms tend to achieve the electron configuration of a _______ or follow the octet rule.

• noble gas

• metal

• halogen

• alkali metal

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Diatomic molecules exist in nature as two bonded atoms of the ________ element.

• same

• different

• adjacent

• opposite

Tags

NGSS.MS-PS1-1

Drawing an electron dot diagram for an atom, ion, or ionic compound involves which of the following steps?

• Representing valence electrons as dots around the element symbol

• Drawing all electrons in the atom as dots

• Using numbers instead of dots to show electrons

• Ignoring the charge of ions when drawing the diagram

Electronegativity values can be used to determine bond polarity by:

• Comparing the difference in electronegativity between two atoms

• Adding the electronegativity values of the atoms

• Multiplying the electronegativity values of the atoms

• Dividing the electronegativity values of the atoms

Hydrogen bonds (a type of intermolecular force) form between molecules because:

• there is an attraction between a hydrogen atom and an electronegative atom like oxygen or nitrogen

• hydrogen atoms are always positively charged

• molecules want to become heavier

• hydrogen bonds are stronger than covalent bonds

A nuclear fission chain reaction is:

• a process where the splitting of a nucleus leads to the release of energy and more neutrons, causing further fission events

• a process where two nuclei combine to form a heavier nucleus

• the emission of radiation from an unstable nucleus without splitting

• the process of electrons being shared between atoms

Tags

NGSS.HS-PS1-8

A nuclear reactor creates electricity by:

• Using nuclear fission to heat water, produce steam, and turn turbines

• Burning fossil fuels to generate heat and steam

• Using solar panels to convert sunlight into electricity

• Harnessing wind energy to spin turbines

Tags

NGSS.HS-PS3-1

An equation for an alpha-particle or beta-particle emission is written by balancing which of the following?

• The atomic number and mass number on both sides of the equation

• Only the atomic number on both sides of the equation

• Only the mass number on both sides of the equation

• The number of electrons on both sides of the equation

Tags

NGSS.HS-PS1-8

What is the definition of a valence electron?

• An electron in the innermost shell

• An electron in the outermost shell

• A proton in the nucleus

• A neutron in the nucleus

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2