Term
| Parts of an atom that have a NEGATIVE charge |
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Term
| Parts of an atom that have a POSITIVE charge |
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Which of the following terms means that metals can be pulled into thin strands or wires?
a.polar
b.alloy
c.ductile
d.malleable |
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| Which particles in an atom are in the nucleus? |
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Term
| The atomic number is the number of _____________ in the nucleus. |
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Term
| A row across the periodic table is called a ____________________. |
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which of the following statements is NOT a part of John Dalton's atomic theory?
a. all elements are composed of atoms that cannot be divided.
b. All atoms of the same element are exactly alike and have the same mass.
c. Electrons move in specific orbits around the nucleus of an atom.
d. Every compound is composed of atoms of different elements, combined in a specific ratio. |
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Definition
c
Dalton did NOT find that electrons move in specific orbits |
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Term
In Rutherford's gold foil experiment, most positively charged particles passed through the foil, but a few particles were deflected strongly. This result caused Rutherford to infer that....
a. electrons move in specific orbits around the nucleus of an atom.
b. an atom's positive charge must be clustered in a tiny region in its center, called the nucleus.
c. electrons have almost no mass.
d. an atom consists of negative charges scattered throughout a ball of positive charge- something like raisins or berries in a muffin. |
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Definition
| B. Rutherford found that an atom's positive charge must be clustered in a tiny region in its center called the nucleus. |
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Term
| True/False: The series of electron orbits in Thompson's model resemble planets orbiting the sun or the layers of an onion. |
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Definition
| False. Bohr's model resembles planets. |
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Term
| A ___________________ is a well-tested idea that explains and connects a wide range of observations. |
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| Scientific theories often include __________-physical, mental, visual, and other representations of an idea to help people understand what tehy cannot observe directly. |
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Term
| Each family in the periodic table has its own characteristics based on the number of _______________________. |
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Term
| Each family of the periodic table has its own characteristic properties based on the number of ___________. |
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Term
| When an atom loses an electron it becomes a ______________ion. |
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Term
| An ionic bond is the attraction between ______________ charged ions. |
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Term
| Ions that are made of more than one atom are examples of __________________. |
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Term
Which of the following is a characteristic property of ionic compounds?
a. They have low melting points
b. They have low boiling points.
c. They form hard, brittle crystals with characteristic shapes.
d. They contain no charged particles |
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Definition
| They form hard, brittle crystals with characteristic shapes |
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Term
| In what form can an ionic comopund conduct electricity? |
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Definition
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Term
| The simplest pure substances that cannot be broken down into any other substances are called ___________. |
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Term
| The smallest particle of an element is called a(n) ______________. |
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Term
In the chemical formula for an ionic compound, which item is written first?
a. positive ion
b. negative ion
c. subscript
d. charge |
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Term
| Electrons involved in bonding between atoms are _____________________. |
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Term
Ionic compounds are electrically....
a. charged
b. positive
c. negative
d. neutral |
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