inside. Comes from radioactive particles like lead 210 or iodine. gamma- high energy photon‚ may go through you. neutrineos-noninteracting‚ come from fusion‚ cosmic rays-very powerful. Come from supernovas. Moves at speed of light moderator-slows neutrons b/c they are absorbed better when slow ciritical mass needed for nuclear bomb-5kg‚ resistence of wire depends on length‚ longer=more resistance. Thickness-thinner=bigger resistance‚ material. Escape velocity=velocity required on the surface to
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Gr7 Science: Applications of the Atom Can The Demonstrated Vast Destructive Power of Nuclear Bombs Continue To Act As A Deterrent To World War III? In early August 1945 an American B-‐29 bomber‚ along with two other planes‚ dropped Little Boy onto the Japanese City of Hiroshima. Then
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Each specific type of atom is a chemical element Three Subatomic Particles: - Protons – Positive (+1)‚ found in nucleus‚ same number as electrons - Neutrons – Neutral (0)‚ found in nucleus‚ number can vary - Electrons – Negative (-1)‚ found in orbitals‚ same number as protons Atomic Nucleus: Center of atom where protons and neutrons are confined‚ entire atom has no electric charge Orbitals: - Areas in which the probability of finding an electron is high - “S” orbitals are spherical
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electrons. protons. neutrons. isotopes. Question 2 of 20 The structural unit that retains the properties of an element is the molecule. atom. cell. electron. Question 3 of 20 Which of the following are found in the nucleus of an atom? Protons Neutrons Electrons A and B Question 4 of 20 The component of an atom or molecule that is most important in determining its chemical properties is the isotope. neutron. electron. proton. Question
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a) I definately agree with this statement and how science is ever changing. The scientific method begins by asking a question about something. After asking a question the next step is to form a hypothesis or educated guess. A repeatable expieriment is then created to test said hypothesis‚ and a large amount of data is collected. Data collection then leads Scientits to analyze the data and come up with a conclusion to see if the hypothesis was proven correct or incoreect. If the hypothesis is proven
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This essay will explain what a black hole is along with how black holes can be detected and how black holes are formed. Moreover‚ this essay will also provide evidence of the existence of black holes and locate where in the universe black holes occur. Firstly‚ a black hole is seen as a body in space whereby a strong gravitational pull causes a suction to be formed. The strength of the gravitational pull is so significant due to the different forms of matter being squeezed into a small hole which
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elements absorb and emit different wavelengths of light. (2) Gamow thought that nuclear fusions took place in the first minutes after the Big Bang‚ because he assumed that the initial components of the universe would have been seperate protons‚ neutrons and electrons. He hoped that they could build bigger atoms by fusion in the heat of the Big Bang‚ because nucleosynthesis‚ which
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of electricity happens in a nuclear reactor in which neutrons are collided with uranium-235 or plutonium-239 (fuel) to create a nuclear fission reaction (The Nuclear Power Plant‚ 2004‚ p. 2810). Products of energy‚ fission products and free neutrons are released (The Nuclear Power Plant‚ 2004‚ p. 2810). Therefore‚ chain reactions will continue to occur. To obtain a controlled release of energy‚ there must be a constant reliable flow of neutrons (The Nuclear Power Plant‚ 2004‚ p. 2810). A moderator
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37‚ an atomic weight of 85.47‚ and a density of 1.53 Mg/m3. Its melting point is 38.9 °C‚ and it boils at 688 °C. Its atomic radius is 0.248 nm and the (+1) ionic radius is 0.148 nm. Number of p+ n° and e- Rubidium has a number of protons of 37‚ neutrons 48 and electrons 37. Uses and compounds There are relatively few commercial uses for rubidium or its compounds. Rubidium is used to make atomic clocks. But these clocks are used only for very specialized purposes where very precise time-keeping
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1. Sun (proton & neutron= nucleus) 2. Planets (electrons) 3. Orbit (shell) Figure 1: Bohr model * Each type of atoms has a certain number of electrons and protons that differentiate it from the atoms of other elements Example: 1 proton 1 electron= Hydrogen (1 type elements) 2 proton‚ 2 neutron‚ 2 electron= Helium (other types elements) * There are many types of elements and it depends on the number of proton‚ neutron‚ and electron. ATOMIC
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