Static Electricity - Charge / Charge Interactions

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What is the structure of an atom?
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Terms in this set (21)
What is the structure of an atom?
There is a nucleus made up of protons(+) and neutrons(no charge) surrounded by a cloud or ring of electrons(-). In a neutral charged atom, there is one proton for every electron.
The charged parts of the atom are the _________________
and the ____________________. The __________________
are positively charged and the __________________ are
negatively charged. The _____________________ are not
charged and thus will not be of importance in this unit.
proton
electron
proton
electrons
neutron
An electrically neutral atom is an atom which _____.
a. does not have any protons or electrons
b. has more neutrons than the sum of all its protons and electrons
c. has a balance of protons and electrons (the same number of each)
d. has a balance of neutrons and electrons (the same number of each)
e. has a balance of protons, electrons and neutrons (the same number of each)
c. has a balance of protons and electrons (the same number of each)
An electrically charged atom (sometimes referred to as an ion) can be distinguished from an
electrically neutral atom in that the charged atom (ion) _______.
a. does not have any neutrons
b. has lost one or more of its neutrons
c. either has a proton or an electron present somewhere within it
d. has a different number of neutrons than the sum of its electrons and protons
e. has an imbalance of protons and electrons (unequal numbers of these)
e. has an imbalance of protons and electrons (unequal numbers of these)
Explain what must happen in order for an oxygen atom to become negatively charged.
Would need to gain an electron from other atom or object
Explain what must happen in order for an oxygen atom to become positively charged.
Needs to lose an atom to another atom or object
What is true of atoms in terms of being neutral, negatively charged, and positively charged is also
true of objects. An object that is negatively charged must have _____________________ (more, less,
the same number of) electrons compared to its protons. An object that is positively charged must
have _____________________ (more, less, the same number of) electrons compared to its protons.
An object that is electrically neutral must have _____________________ (more, less, the same number
of) electrons compared to its protons.
more
less
the same number
Negatively Charged
# of e- _____ # of p+
>
Positively Charged
# of e- _____ # of p
<
Electrically Neutral
# of e- ______ # of p
=
During a physics lab, a plastic strip was rubbed with cotton and became positively charged. The correct explanation for why the plastic strip becomes positively charged is that ... a. the plastic strip acquired extra protons from the cotton. b. the plastic strip acquired extra protons from the charging process. c. protons were created as the result of the charging process. d. the plastic strip lost electrons to the cotton during the charging process.d. the plastic strip lost electrons to the cotton during the charging process.Miss Chiff, the seventh-grade science teacher, greets her students in an unusual manner. She stands at the door of her classroom, scuffing her feet back and forth on the carpet. As she does so, electrons move from the carpet to her shoes to her body. Miss Chiff is now charged with a _________________ (positive, negative) type of charge. Then, Miss Chiff reaches out and touches her students on the nose as they enter the classroom. As she does, some electrons leave Miss Chiff and move onto her students. Miss Chiff is now _________ (more, less) negatively charged than before the contact with the student. And the student is now charged with a _________________ (positive, negative) type of charge.negative less negativeIn a lab report during the Static Electricity unit, Aaron Agin suggests that a sample of wool became positively charged by gaining protons from the rubber balloon that it rubbed. Explain what is wrong with Aaron's statement.You can not gain protons because that would change the type of material or type of atom. When something becomes + or - charged it is because there is a transfer of electrons either to the object or away from the object. In this case, the wool because positive because it gave up electrons to the rubber ballon.____________________ are negatively charged and ____________________ are positively charged. As an object begins to gain or lose electrons from its atoms, it becomes positively or negatively charged. A negatively charged object has more ____________________ than ____________________. A positively charged object has more ____________________ than ____________________.Electrons protons electrons protons protons electronsOppositely charged objects _______attractLike charged object _______repelA charged object and a neutral object will ________attractYour physics teacher has prepared the room for the class's entry by suspending several inflated balloons from the ceiling. Upon entering the physics room, you observe two balloons being drawn towards each other as shown at the right. The attraction of these balloons for one another provides evidence that ______. a. both balloons are charged with the same type of charge b. both balloons are charged with the opposite type of charge c. both balloons are charged - either with the same type or opposite type of charge d. only one of the balloons is charged; the other is neutral e. at least one of the balloons is charged; the other is either charged or neutrale. at least one of the balloons is charged; the other is either charged or neutralAs you look around the room, you observe two other balloons being pushed away from each other as shown at the right. The repulsion of these balloons from one another provides evidence that ______. a. both balloons are charged with the same type of charge b. both balloons are charged with the opposite type of charge c. both balloons are charged - either with the same type or opposite type of charge d. only one of the balloons is charged; the other is neutral e. at least one of the balloons is charged; the other is either charged or neutrala. both balloons are charged with the same type of chargeIn one part of the room, there are two balloons - one hanging straight down and the other being attracted to it. This is evidence that _____. a. balloon A is charged and balloon B is neutral b. balloon B is charged and balloon A is neutral c. balloon A is neutral and balloon B is negative d. balloon A is neutral and balloon B is positive e. ... nonsense! This would never happen if the balloons are identical and simply suspended by strings. They will attract each other and both be deflected from a vertical orientation.e. ... nonsense! This would never happen if the balloons are identical and simply suspended by strings. They will attract each other and both be deflected from a vertical orientation.Anna Litical is performing a physics lab in which she charges a variety of materials and tests to determine their charge by bringing them near a negatively charged balloon and near some neutral paper bits at rest on the table. Help Anna draw conclusions from her observations by entering +, -, neutral (or a combination of these if absolute conclusiveness is not possible). a. Object A is observed to attract the paper bits; object A must be ________________. b. Object B is observed to attract the balloon; object B must be ________________. c. Object C is observed to repel the balloon; object C must be ________________. d. Object D is observed to attract both the paper bits and the balloon; object D must be ________________. e. Object E is observed to attract the paper bits and repel the balloon; object E must be ________________.A: + or - B: + C: - D: + E: -