Charging by Induction Purpose: To determine the kind of charge induced on a neutral object when it is approached by a charged object. Materials: • metal-leaf electroscope • ebonite rod • fur • glass rod • silk • human finger (with body) Procedure: 1. The metal-leaf electroscope was approached‚ but not touched‚ by a negatively charged ebonite rod. The rod was moved toward and away from the metal ball on the electroscope several times. Observations were recorded
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of subatomic particles. The nucleus of an atom is composed of two different types of particles‚ protons and neutrons. Protons are positively charged atoms. The weight of a proton is one amu. Protons are located inside the nucleus and cannot move from inside the nucleus. The proton symbol is . Neutrons are also located inside the nucleus and have a neutral charge. Neutrons are also one amu like protons. Neutrons can move from the nucleus of an atom making an atom an isotope. The neutron symbol is
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Atoms Atom is the fundamental building block of all stuff‚ or what scientists like to call "matter". An individual atom is very small. In fact‚ the smallest type of atom‚ hydrogen‚ has a diameter of 10-8 cm. Every single object is composed of atoms. Our body is made up of many‚ many individual atoms. There are also many different types of atom. These different types are called elements. Examples of some elements are hydrogen‚ oxygen‚ and helium. Under normal conditions many atoms can stick together
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****Atoms Think and Compare: Page 331 Q-3 Consider these atoms: hydrogen H‚ aluminum Al‚ argon‚ Ar. Rank them‚ from smallest to largest‚ in order of (a) size; (b) number of protons in the nucleus; (c) number of electrons. In order of size from smallest to largest: Hydrogen H‚ Argon Ar‚ Aluminum Al. In order of proton from smallest to largest: Hydrogen H‚ Aluminum Al‚ Argon Ar. In order of electron from smallest to largest: Hydrogen H‚ Aluminum Al‚ Argon Ar. Q-4 Consider these atoms:
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Race: Metal Attending Physician: Unknown Gender: Solid Place of Birth: Many different countries Personality: (melting- 600.61 K --- 327.46 C --- 621.43 F) (Boiling- 2022 K --- 1749 C --- 3180 F) Page 2 Pronunciation Rebus: lēd/ Page 4 # of protons: 82 # of neutrons: 125 # of electrons: 82 Atomic number: 82 Page 6 Family Name: Carbon Family Address: 6 Ancient Drive Brother and Sister: Carbon‚ Silicon‚ Germanium‚ Tin. FleroviumProud Parents of Lead Page 1 Name of element: Kobe Lead
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Particle physics and nuclear physics concern themselves with the study of these particles‚ their interactions‚ and matter made up of them which do not aggregate into atoms. These particles include atomic constituents such as electrons‚ protons‚ and neutrons (protons and neutrons are actually composite particles‚ made up of quarks)‚ as well as other particles such as photons and neutrinos which are produced copiously in the sun. However‚ most of the particles that have been discovered and studied
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Recall that isotopes of an element are atoms that have the same number of protons but different numbers of neutrons in their nuclei. Different elements are distinguished by having different numbers of protons. Recall that isotopes of an element are atoms that have the same number of protons but different numbers of neutrons in their nuclei. Different elements are distinguished by having different numbers of protons. The released energy and matter are collectively called nuclear radiation.
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a) A proton has ………positive…….. charge. b) A neutron has ……zero……….. charge. c) An electron has ………negative…….. charge. d) A proton and an electron have ……opposite……….. and ………equal…….. charge. 2. Complete the following sentences using words from the list below. electron(s) ion(s) neutron(s) nucleus (nuclei) proton(s) a) Every atom contains a ……nucleus……….. which is positively charged. e) The nucleus of an atom is composed of ………protons…….. and
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40mg by two. The answer will be three hours. a) Is incorrect because it equal 2 half-lives. 15. The smallest particle of an element that retains the characteristics of the element is a(n) A) atom. B) electron. C) nucleus. D) neutron. E) proton. The correct answer is A)‚ atom. According to page 105 an atom retains the characteristic of that element. b) Describes the negative charge of a particle. Even though it has no mass it is not considered the characteristic of that element c)
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charged particle was the cause of the light produced by the cathode-ray tube. He also discovered that these particles are present in all elements. These cathode-ray particles are now known as electrons. Soon after the discovery of electrons the proton was discovered. This led Thomson to conclude that ther were an equal number of both particles present in the atom. Twelve years later Lord Ernest Rutherford was experimenting with alpha particles. He shot a stream of them at a piece of gold
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