Chemical Bonds

Some elements combine chemically and no longer have the same ________________ they did before forming a compound.

• valence electons
• energy
• properties
• group number

Tags

NGSS.HS-PS1-2

A _________________ is composed of symbols and subscripts indicating the number of atoms of an element in a compound.

• Chemical Equation
• Chemical Reaction
• Synthesis Reaction
• Chemical Notation

Atoms form compounds when the compound is more ______________ than the separate atoms.  Noble gases are more _________than other elements because they have a complete outer energy level.

• reactive
• stable
• explosive
• toxic

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Elements that do not have full outer energy levels are more stable in __________________.

• bonds
• formulas
• reactions
• compounds

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Atoms gain lose, gain, or ______electrons to get a stable outer energy level.

• share
• split
• create
• destroy

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

A ____________is the force that holds atoms together in a compound.

• Chemical Formula
• Chemical Reaction
• Chemical Bond
• Synthesis Reaction

Tags

NGSS.HS-PS1-3

NGSS.HS-PS1-4

A _______ is a charged particle because it has more or fewer electrons than protons.  When an atom _____ an electron, it becomes a positively charged ion.  When an atom ____an electron, it becomes a negatively charged ion.

• isotope, gains, loses
• isotope, loses, gains
• ion, loses, gains
• ion, gains, loses

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

An ionic compound is held together by the _______--the force of attraction between opposite charges of the atoms.

• Covalent Bond
• Ionic Bond
• Synthetic Bond
• Molecular Bond

Tags

NGSS.HS-PS1-3

The result of this bond is a _________compound.

• neutral
• polar
• positively charged
• negatively charged

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

The sum of the charges on the ions in a unit of the compound is ___________. 

• positive
• negative
• zero
• ±1