Lower atomic numbers
Honors Chemistry Worksheet on Periodic Table
The difference in atomic numbers between arsenic, an element of Group 15 (VA or 5A), and antimony, also an element of Group 15 (VA or 5A), is 18. Where are these 18 electrons in the Sb atom? Notice in the figure below, the radius of lanthanum is larger than lutetium. The atomic number of Lu is fourteen (14) greater than that for lanthanum.
[DOC File]ATOMIC RADII INSTRUCTIONS - JPSAOS
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Explain, in terms of the modern atomic model, why the radii in the second period (atomic # 3-9) show . this trend. Explain why there is a change from atomic numbers 9 & 11. Explain the trend indicated by atomic numbers 1, 3, & 11. 6. Based on the information in your graph, predict the atomic radii for atomic number 10 (is it higher or lower ...
HONORS CHEMISTRY MID-TERM REVIEW
a. numbers of neutrons c. numbers of electrons b. numbers of protons d. atomic numbers ____ 7. In which of the following is the number of neutrons correctly represented? a. F has 0 neutrons. c. Mg has 24 neutrons. ... When an electron moves from a lower to a higher energy level, the electron ____.
[DOC File]Teaching Atomic Structure Using Cooperative Learning
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The expert groups were Atomic Number, Mass Number, Isotope, and Nuclear Atom - In addition to using the text as a reference, also use the periodic table as a teaching tool. The atomic number and mass number experts should become familiar with the location of atomic numbers and atomic …
[DOC File]CHAPTER 2
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Solution: Atomic number = 17; mass number = 17 + 18 = 35. The symbol is . The atomic numbers and average atomic masses of the elements are given in the periodic table on the inside front cover of the text. Each element is represented by a square with the atomic symbol in it. The number above the atomic symbol is the atomic number. 2.4 Atomic Masses
[DOC File]Chapter 2: Atomic Structure and Inter-atomic Bonding
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– Atoms of the same atomic number that have different numbers of neutrons. atomic weight – This is not a weight! It is the weighted average of the atomic masses for all isotopes of an element. This is why the atomic weight of carbon is 12.011 and not 12.00. (Most carbon is C12 , however about 1.1% of naturally occurring carbon is C13) amu
[DOCX File]Academic Web | Chadron State College
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Alpha decay results in the emission of an α particle, 2 4 α , and produces a daughter nucleus with a mass number that is lower by 4 and an atomic number that is lower by 2 than the parent nucleus. Beta decay converts a neutron to a proton and emits a high-energy electron, producing a daughter nucleus with the same mass number as the parent ...
[DOCX File]Ms. Drury's Flipped Chemistry Classes
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The first ionization energy of neon (atomic number 10) is significantly higher than that of argon (atomic number 18) but significantly lower than the first ionization energy of helium (atomic number 2), despite all three elements being in the same group.
Chapter 3: Mass Relationships in Chemical Reactions
112. Nickel has a lower atomic mass than cobalt, even though it has a higher atomic number. One possible explanation is that one of the average atomic masses was miscalculated. In the case of cobalt, there is only one isotope: 100% 59Co at a mass of 58.9332 amu. For nickel, however, there are five isotopes as given in the table.
[DOC File]Essential Question:
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When an atomic nucleus changes, it is very probable that the products will be different elements than the reactants. 238 234 4. U ( Th + He. 92 90 2. Many nuclei are radioactive. This means they are unstable and will decay by emitting a particle, transforming the nucleus into another nucleus, or into a lower …
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