... 32. Give an example of a compound. H2O
33. What is a molecule? An element with more than one atom attached to it
34. Give an example of a molecule.
O₂- air we breathe
O₃- ozone layer
35. As you go from left to right on the periodic table, describe the changes that
occur to element's atomic structure ...
... 3) element at the top
Elements in the same group have:
A. similar characteristic properties: bp/fp/sp heat
B. same # electrons in the valence shell
C. same oxidation #: charge after octet rule applied
4. Zig-zag line between B-Al and Po-At separates metals
(80% chart) on the left from non-metals on ...
Chem 101A Exam 4 Concepts Chapter 7 – Modern Atomic Theory
... Notable scientists and their contributions: Rutherford, Bohr, Planc, de Broglie, Heisenberg,
The four Quantum Numbers (n,l,ml,ms), when they are allowed, how they describe the electron state,
and how they relate to:
Energy levels, orbitals (number allowed, shapes, sizes), elec ...
2.2 Periodic Trends
... What are the trends that occur in the periodic table by organizing elements by
their atomic number?
Periodic trends are specific patterns that are present in the periodic table that
illustrate different aspects of a certain element.
Periodic trends, arising from the arrangement of the periodic t ...
Chapter 11 and 12-2 Review/Study Guide for Test
... 13. Explain the difference between a group and a period on the periodic table of elements.
Groups = columns (there are 18 total) and Periods = Rows (there are 7). Also, a group shares
14. Why are neither the alkali metals nor the alkaline-earth metals found uncombined in
... -the number of protons in an atom of an element
•all atoms of an element have the same atomic #
•written as a subscript next to the element’s symbol
•in a neutral atom, the number of protons is equal to the
number of electrons (balanced charges).
Exam 1 Review Questions
... Covalent compounds contain both metal and nonmetal atoms.
Ionic compounds are made of molecules.
Dmitri Mendeleev published the first modern atomic theory in 1805.
Fluorine is found as a metal in its pure form.
Francium chloride FrCl is a covalent compound.
Graphite is a compound containing carbon a ...
Chemical reactions revision
... Element are arranged in the table in order of their atomic number
Elements in different groups (columns) have different properties.
Elements are often split into the groups metals and non-metals.
Metals are strong, sonorous (ring), malleable (can be bent into shape) and are good
conductors of heat a ...
CHEM 101 Dual Enrollment HW4 Question 1 of 12 Dalton`s
... Question 1 of 12
Dalton's postulates, also known as Dalton's atomic theory, include some proposals that have been
updated or changed due to new discoveries. Which of the following statements were parts of Dalton's
original atomic theory? Select all that apply.
Atoms of the same element have the same ...
Extra Credit Test Review
... 12.One atom has 17 protons, 18 neutrons, and 17 electrons. Another atom has 17 protons,
19 neutrons and 17 electrons. Are these the same element? Yes No Explain:
13.Today we use Mendeleev’s arrangement, elements are arranged by incre ...
Chemistry Exam Review
• an atom with a different number of neutrons and
therefore a different mass
... Cation vs Atom
The History of the Modern Periodic Table
... In 1913, through his work with X-rays, he
determined the actual nuclear charge
(atomic number) of the elements*. He
rearranged the elements in order of
increasing atomic number.
*“There is in the atom a fundamental
quantity which increases by regular
steps as we pass from each element to
the next. T ...
... We cannot show videos due to copyright.
Sources for appropriate videos may include:
Discovery Education and
AGC Educational Media
... particle called an ion.
When an atom loses an electron it has more protons therefore
becoming positively charged. When an atom gains an electron it has
more electrons therefore becoming negatively charged.
... A. 7 periods—rows of elements whose properties change gradually
B. 18 groups---columns with family of elements having similar
properties both physical and chemical.
C. Group 1 and 2, 13 to 18—representative elements.
D. Group 3 to 12—transition e ...
... identify key groups, periods, and regions of elements on the periodic table. (B1)
identify and explain trends in the periodic table as they relate to ionization energy, electronegativity, shielding effect, and relative
compare an element’s reactivity to the reactivity of other element ...
Understanding the Atom GN
... When atoms of the same element have different numbers of neutrons they are called
Most elements have ______________________ isotopes.
Mass Number - ________________________________________ ...
Ununennium, also known as eka-francium or simply element 119, is the hypothetical chemical element with atomic number 119 and symbol Uue. Ununennium and Uue are the temporary systematic IUPAC name and symbol, until a permanent name is decided upon. In the periodic table of the elements, it is expected to be an s-block element, an alkali metal, and the first element in the eighth period.Ununennium is the element with the lowest atomic number that has not yet been synthesized. To date, all attempts to synthesize this element have been unsuccessful. Its position as the seventh alkali metal suggests that it would have similar properties to the alkali metals, lithium, sodium, potassium, rubidium, caesium, and francium; however, relativistic effects may cause some of its properties to differ from those expected from a straight application of periodic trends. For example, ununennium is expected to be less reactive than caesium and francium and be closer in behavior to potassium or rubidium, and while it should show the characteristic +1 oxidation state of the alkali metals, it is also predicted to show the +3 oxidation state unknown in any other alkali metal.