Chapter 11 and 12-2 Review/Study Guide for Test
... 5. What happens to the electrons in the atom when it becomes an ion? They are gained or lost to another atom. 6. What is an isotope? When atoms of the same element have different numbers of neutrons from each other. 7. What determines the identity of an element? The number of protons in the nucleus ...
... 5. What happens to the electrons in the atom when it becomes an ion? They are gained or lost to another atom. 6. What is an isotope? When atoms of the same element have different numbers of neutrons from each other. 7. What determines the identity of an element? The number of protons in the nucleus ...
Sem 1 Final
... • Which subatomic particles is the most responsible for the chemical properties of the element? ...
... • Which subatomic particles is the most responsible for the chemical properties of the element? ...
Dr. Harris Chemistry 105 Practice Exam 1 Isotope Atomic Number
... 4. Using the Pauli Exclusion Principle, explain why an s-orbital can hold a maximum of 2 electrons? There is only one s-orbital in each shell. Adding a third electron would mean that two of the three would have the same set of four quantum numbers. 5. Balance the following: C6H14 (l) + O2 (g) ...
... 4. Using the Pauli Exclusion Principle, explain why an s-orbital can hold a maximum of 2 electrons? There is only one s-orbital in each shell. Adding a third electron would mean that two of the three would have the same set of four quantum numbers. 5. Balance the following: C6H14 (l) + O2 (g) ...
Atomic Structure and the Periodic Table
... Scientists once thought these metals were available only in tiny amounts on the Earth ...
... Scientists once thought these metals were available only in tiny amounts on the Earth ...
SCH3U Course Review
... 6. Describe how you would separate a mixture of salt, sand, and iron filings. ...
... 6. Describe how you would separate a mixture of salt, sand, and iron filings. ...
Chapter 9 - Fayetteville State University
... are the alkali metals (Li, Na, K, Rb, Cs), the halogens (F, Cl, Br, I). 8) Groups: A sequence of elements of increasing atomic number in the periodic table that share similar chemical properties (Example: group 1A Li, Na, K, Rb, Cs) 9) Metals: are characterized for having extra electrons outside the ...
... are the alkali metals (Li, Na, K, Rb, Cs), the halogens (F, Cl, Br, I). 8) Groups: A sequence of elements of increasing atomic number in the periodic table that share similar chemical properties (Example: group 1A Li, Na, K, Rb, Cs) 9) Metals: are characterized for having extra electrons outside the ...
PS 2.2
... the weighted average of the masses of the naturally occurring isotopes of an element. The atomic mass of an element can be found on the periodic table. Since it is an average, it is usually not a whole number. ...
... the weighted average of the masses of the naturally occurring isotopes of an element. The atomic mass of an element can be found on the periodic table. Since it is an average, it is usually not a whole number. ...
Chemistry lecture notes
... Protons and neutrons are held together by an attraction force (strong interaction). An electrostatic ruplsion between protons occurs inside the nucleus The balance of the two forces controls some important features of nuclear stability ...
... Protons and neutrons are held together by an attraction force (strong interaction). An electrostatic ruplsion between protons occurs inside the nucleus The balance of the two forces controls some important features of nuclear stability ...
Chemical Bonding
... • Going from left to right across a given period, the atomic number (no. of p) increases positive charge on the nucleus (nuclear charge) increases. • This means that there is a greater force of attraction for the electrons in the shell and the distance between the electrons and the nucleus decreas ...
... • Going from left to right across a given period, the atomic number (no. of p) increases positive charge on the nucleus (nuclear charge) increases. • This means that there is a greater force of attraction for the electrons in the shell and the distance between the electrons and the nucleus decreas ...
Worksheet - Models of the Atom - Teacher
... 7. On the back of this sheet, construct a timeline of the models of the atom. Include the names of the six models and important discoveries that led to each. (See Changing Atomic Models Notes.) 8. Draw pictures representing the models of Thomson and Rutherford. ...
... 7. On the back of this sheet, construct a timeline of the models of the atom. Include the names of the six models and important discoveries that led to each. (See Changing Atomic Models Notes.) 8. Draw pictures representing the models of Thomson and Rutherford. ...
File - Mrs. Riggs Online
... Electrons arranged in concentric layers that surround the nucleus called electron shells/energy levels/clouds/orbitals: ...
... Electrons arranged in concentric layers that surround the nucleus called electron shells/energy levels/clouds/orbitals: ...
biol 1406 chapter 3: water
... 1. An element is a substance that can be broken down into simpler substances. ______________________ 2. On Earth, 90 elements occur naturally. ________________________________________ 3. Only four elements—carbon, hydrogen, oxygen, and nitrogen—make up more than 96 percent of the mass of a human. __ ...
... 1. An element is a substance that can be broken down into simpler substances. ______________________ 2. On Earth, 90 elements occur naturally. ________________________________________ 3. Only four elements—carbon, hydrogen, oxygen, and nitrogen—make up more than 96 percent of the mass of a human. __ ...
Midterm Review 2017
... 9) The diagram below represents the bright-line spectra of four elements and a bright-line spectrum produced by a mixture of three of these elements. ...
... 9) The diagram below represents the bright-line spectra of four elements and a bright-line spectrum produced by a mixture of three of these elements. ...
What does the Periodic Table tell us?
... Any element with an atomic number greater than ____ is man-made (created in a lab) Why is there usually a decimal place in the atomic mass number? It is due to _________________________ Isotopes – atoms of the same element with the same # of ____________ but a different # of _____________ th ...
... Any element with an atomic number greater than ____ is man-made (created in a lab) Why is there usually a decimal place in the atomic mass number? It is due to _________________________ Isotopes – atoms of the same element with the same # of ____________ but a different # of _____________ th ...
CHEM 1305 - HCC Learning Web
... PART II – Show your work: (8 points each) 21a. Element X has natural isotopes; X-63 (62.940amu) and X-65 (64.928amu). Calculate the atomic mass of element X given the abundance of X-63 is 69.17% b. Which element corresponds to each of the following electron configuration? i. 1S2 2S2 2P5 ii. 1S2 2S2 ...
... PART II – Show your work: (8 points each) 21a. Element X has natural isotopes; X-63 (62.940amu) and X-65 (64.928amu). Calculate the atomic mass of element X given the abundance of X-63 is 69.17% b. Which element corresponds to each of the following electron configuration? i. 1S2 2S2 2P5 ii. 1S2 2S2 ...
Slide 1
... 20. Atoms of elements in a group on the Periodic Table have similar chemical properties. This similarity is most closely related to the atoms‘ 1. number of principal energy levels 2. number of valence electrons 3. atomic numbers 4. atomic masses ...
... 20. Atoms of elements in a group on the Periodic Table have similar chemical properties. This similarity is most closely related to the atoms‘ 1. number of principal energy levels 2. number of valence electrons 3. atomic numbers 4. atomic masses ...
A Thumbnail Review of Regents Chemistry
... Radioisotope = unstable nucleus Atomic # 84 and above = only radioactive isotopes 1 ½ ¼ 1/8 = 3 half live events Half-Life Formula: # of decay events = time / half-life Medical isotopes = short half lives = 131I (thyroid) and 60Co (cancers) Dating Isotopes = long half-lives = 238U (rocks) and ...
... Radioisotope = unstable nucleus Atomic # 84 and above = only radioactive isotopes 1 ½ ¼ 1/8 = 3 half live events Half-Life Formula: # of decay events = time / half-life Medical isotopes = short half lives = 131I (thyroid) and 60Co (cancers) Dating Isotopes = long half-lives = 238U (rocks) and ...
Ch 11 Atoms etc GNC
... What do you know about hydrogen, based only on the fact that it is a nonmetal? It is probably a gas at room temperature. It probably does not conduct heat and electricity very well. It is probably dull in appearance. It cannot change shape without breaking. It is a basis of the chemicals of life. Se ...
... What do you know about hydrogen, based only on the fact that it is a nonmetal? It is probably a gas at room temperature. It probably does not conduct heat and electricity very well. It is probably dull in appearance. It cannot change shape without breaking. It is a basis of the chemicals of life. Se ...