review

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-PS1-1

NGSS.HS-PS1-2

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

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.MS-PS1-1

The result of this bond is a _________compound.

• neutral
• polar
• positively charged
• negatively charged

Tags

NGSS.HS-PS1-1

__________are neutral particles formed as  result of sharing electrons.

• Protons
• Electrons
• Molecules
• Ions

Tags

NGSS.HS-LS1-6

A ________is the force of attraction between atoms sharing electrons.

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

Atoms can form double or triple ______depending on whether they share two or three pairs of electrons.

• Molecules
• Bonds
• Compounds
• Elements

Tags

NGSS.HS-PS1-1