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ABCTE Ch. 3 Basic Chemistry Exam
Questions And Answers (Guaranteed A+)
How many neutrons does an atom of zinc -64 (64/30 Zn) have? - Answer✔34
Which of these pairs of atoms is most likely to form an ionic bond? - Answer✔Calcium and
chlorine
An aqueous solution has a hydrogen ion concentration of 1.0 x 10^-6 M. This solution is
classified as a - Answer✔Weak acid
3 Subatomic particles - Answer✔Electron, Proton, Neutron
Electron - Answer✔is negatively charged
Proton - Answer✔is positively charged
Neutron - Answer✔an electrically neutral part of the atoms nucleus (neutral charge)
Homogenous Mixture - Answer✔are made up of 2 or more distinct substances, but they have a
constant composition within a smaple
Ex: Pure Water
Heterogenous Mixture - Answer✔constant of substances that retain their distinct characteristics
and do not blend completely
What two subatomic particles are clustered together to form the atom of the nucleus? -
Answer✔Proton and Neutron
Isotopes - Answer✔atoms with the same number of protons and different number of neutron
Valence Eletrons - Answer✔the number of protons increases = the number of electrons needed
to balance the charge also increases
Ionic Bond - Answer✔Formed when one or more electrons are transferred from one atom to
another
Generally form between a metal and nonmetal
Always with both positive and negative partners
Covalent Bond - Answer✔A chemical bond formed when two atoms share electrons
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ABCTE Ch. 3 Basic Chemistry Exam
Questions And Answers (Guaranteed A+)
How many neutrons does an atom of zinc -64 (64/30 Zn) have? - Answer✔34
Which of these pairs of atoms is most likely to form an ionic bond? - Answer✔Calcium and
chlorine
An aqueous solution has a hydrogen ion concentration of 1.0 x 10^-6 M. This solution is
classified as a - Answer✔Weak acid
3 Subatomic particles - Answer✔Electron, Proton, Neutron
Electron - Answer✔is negatively charged
Proton - Answer✔is positively charged
Neutron - Answer✔an electrically neutral part of the atoms nucleus (neutral charge)
Homogenous Mixture - Answer✔are made up of 2 or more distinct substances, but they have a
constant composition within a smaple
Ex: Pure Water
Heterogenous Mixture - Answer✔constant of substances that retain their distinct characteristics
and do not blend completely
What two subatomic particles are clustered together to form the atom of the nucleus? -
Answer✔Proton and Neutron
Isotopes - Answer✔atoms with the same number of protons and different number of neutron
Valence Eletrons - Answer✔the number of protons increases = the number of electrons needed
to balance the charge also increases
Ionic Bond - Answer✔Formed when one or more electrons are transferred from one atom to
another
Generally form between a metal and nonmetal
Always with both positive and negative partners
Covalent Bond - Answer✔A chemical bond formed when two atoms share electrons
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