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# Bonds and Mixing Questions - All Grades

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Valence electrons are best described in chemistry as
1. positive electrons in the atom.
2. all of the electrons in the atom.
3. the outer shell electrons in the atom.
4. the number of electrons the atom needs to be stable.
A covalent bond is formed as the result of
1. transferring electrons.
2. sharing an electron pair.
3. transferring protons.
4. sharing a proton pair.
In ionic bonds, which of the following is true?
1. Electrons are shared unequally between atoms
2. Electrons are shared equally between atoms
3. Neutrons are transferred between atoms
4. Electrons are transferred between atoms
Elements and compounds that have fixed compositions can be called
1. mixtures.
2. substances.
3. alloys.
4. aqueous solutions.
Which statement best describes the nature of a covalent bond?
1. Electrons are shared between atoms
2. Electrons are given up or taken from or by atoms
3. Electrons have nothing to do with these bonds
An ionic bond could form between
1. Silicon and Sulfur.
2. Fluorine and Chlorine.
3. Sodium and Aluminum.
4. Potassium and Oxygen.
5. None of the above.
Covalent bonds result from
1. the sharing of equal numbers of electrons by two atoms.
2. the exchange of equal numbers of electrons by two atoms.
3. the combination of two atoms of the same valence.
4. sharing of unequal numbers of electrons by two atoms.
What is the correct ionic symbol for the nitrogen ion?
1. $N^{+2}$
2. $N^{-2}$
3. $N^{+3}$
4. $N^{-3}$

This question is a part of a group with common instructions. View group »

When calcium and phosphorus form an ionic compound, what is the chemical formula of the compound?
1. $CaP$
2. $Ca_2P_3$
3. $Ca_3P_2$
4. $Ca_3P_3$
A solution of two or more metals such as brass is
1. an alloy.
2. a heterogeneous mixture.
3. matter.
4. a mixture.
Which of the following statements is correct about hydrogen bonding?
1. Hydrogen bonding is a type of covalent bond
2. Hydrogen bonding occurs between water molecules
3. Hydrogen bonding connects phosphates to carbons within DNA
4. Hydrogen bonding is responsible for waters low heat of vaporization
A covalent bond is formed by the                      .
1. losing of electrons
2. transfer of electrons
3. sharing electrons
4. gaining electrons
1. $Ca_2S_2$
2. $CaS$
3. $CaS_2$
4. $Ca_2S$