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30 seconds
1 pt
Some elements combine chemically and no longer have the same ________________ they did before forming a compound.
valence electons
energy
properties
group number
Multiple Choice
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30 seconds
1 pt
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
Multiple Choice
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30 seconds
1 pt
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
Multiple Choice
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30 seconds
1 pt
Elements that do not have full outer energy levels are more stable in __________________.
bonds
formulas
reactions
compounds
Multiple Choice
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30 seconds
1 pt
Atoms gain lose, gain, or ______electrons to get a stable outer energy level.
share
split
create
destroy
Multiple Choice
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30 seconds
1 pt
A ____________is the force that holds atoms together in a compound.
Chemical Formula
Chemical Reaction
Chemical Bond
Synthesis Reaction
Multiple Choice
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30 seconds
1 pt
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
Multiple Choice
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30 seconds
1 pt
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
Multiple Choice
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30 seconds
1 pt
The result of this bond is a _________compound.
neutral
polar
positively charged
negatively charged
Multiple Choice
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30 seconds
1 pt
The sum of the charges on the ions in a unit of the compound is ___________.
positive
negative
zero
±1
Multiple Choice
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30 seconds
1 pt
__________are neutral particles formed as result of sharing electrons.
Protons
Electrons
Molecules
Ions
Multiple Choice
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30 seconds
1 pt
A ________is the force of attraction between atoms sharing electrons.
Synthetic Bond
Ionic Bond
Molecular Bond
Covalent Bond
Multiple Choice
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30 seconds
1 pt
Atoms can form double or triple ______depending on whether they share two or three pairs of electrons.
Molecules
Bonds
Compounds
Elements
Multiple Choice
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30 seconds
1 pt
Electrons shared in a molecule are held ________to the atoms with the larger nucleus.