Quizizz review Ch 1 test

A _________________ is composed of symbols and subscripts indicating the number of atoms of an element in a compound (ex. H₂O).

• 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

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

• share
• split
• create
• destroy

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

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

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

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

A ________is the force of attraction between atoms sharing electrons.

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

What are valence electrons?

• sum of the protons and neutrons
• protons minus electrons
• electrons in the inner shells
• electrons in the outer shell

If an atom loses two electrons what charge will it have?

• -2
• -1
• +1
• +2

If an atom gains two electrons what charge will it have?

• -2
• -1
• +1
• +2