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The following three diagrams are carbon atoms: 2. 1 H. 3. 1 H. 12 C. 13. 6 6 C 14. 6 C. (6 protons, 6 neutrons) (6 protons, 7 neutrons) (6 protons, 8 neutrons) Notice the type of notation used for atoms: A X. Z. X = chemical symbol of the element. Z = “atomic number” A = “mass number”
Week 1 –Atomic Structure Elements, Mixtures and Compounds Atoms and molecules Remember that an element is one type of atom, like carbon, gold or chlorine. We will look at three ways that atoms can exist. 1. Single atoms The atoms of some elements do not join up with other atoms. They stay as single atoms. The element helium is like this.
CHEM1002 Worksheet 1: Introduction to Carbon Chemistry. Model 1: Bonding in Organic Molecules. Here is a partial periodic table. The shaded elements are the focus of organic chemistry. The number above each column indicates the number of covalent bonds that an element in that column will typically make. 1. H Li Na. K Rb. 2. Be Mg Ca Sr. 3. B.
CREATING BOHR DIAGRAMS Rules for arranging electrons: 1. The 1st energy level can hold up to 2 electrons. 2. The 2nd energy level can hold up to 8 electrons. 3. The 3rd energy level can hold up to 8 electrons. Sketch An Atom Draw 3 protons in the nucleus and label with the charge. Draw 4 neutrons in the nucleus and label with the charge. Draw 2 ...
PRACTICE PROBLEMS, CHAPTERS 1 - 3 (Covered from Ch. 3: Alkane and Alkyl Halide nomenclature only) 1. The atomic number of boron is 5. The correct electronic configuration of boron is: A. 1s22s3 B. 1s22p3 C. 1s22s22p1 D. 2s22p3 E. 1s22s23s1 2. How many distinct p orbitals exist in the second electron shell, where n = 2? 3.
1. Label the parts of the atom to the right. Include the following labels: proton, electron, neutron, nucleus. 2. What elements is represented by this diagram? How do you know? 3. What is the charge of this nucleus? What is the charge of this atom overall? 4. What is the mass of this atom? 5. Using a periodic table, look up titanium. a. What is ...
Bohr Diagrams 1) Check your work. 2) You should have 6 total electrons for Carbon. 3) Only two electrons can fit in the 1st energy level. 4) The 2nd energy level can hold up to 8 electrons. 5) The 3rd energy level can hold 18, but the outer shell can only hold 8 electrons. C P+ = 6 N0 = 6 2e-4e-
