... Horizontal rows of the periodic table are called this.
Vertical columns of the periodic table are called ‘groups’ or this.
Which element in period 3 has 6 valence electrons?
Which element in period 5 has only 1 electron in its 5s sublevel?
Which element in period 3 has a full octet?
What family of e ...
Homework Geochem Test Review
... 12. What part of an atom is negative? _________ What part is positive? _________
What part is neutral? ___________
13. What is the atomic mass? Why don’t we count the electrons when determining the
Dmitri MendeleevанааA Russian chemist, noticed a repeating
... pattern of chemical properties in the elements that were known
at the time. Mendeleev arranged the elements in the order of
increasing atomic mass to form something close to the
modern day periodic table.
The pattern of repeating order is called periodicity.
... What are the 3 subatomic particles?
Where are they located and what role
do they play in matter?
Learning Standards vocab chemical basis and molecules of life 09
... Given the number of protons, identify the
element using a Periodic Table.
Explain the arrangement of the elements on
the Periodic Table, including the significant
relationships among elements in a given
column or row.
Explain how ions and ionic bonds are
formed (e.g., sodium atoms lose an elec ...
atomic number - Thomas C. Cario Middle School
... The periodic table is a chart containing information about
the atoms that make up all matter.
An element is a substance made up of only one type of
The atomic number of an atom is equal to the number of
protons in its nucleus.
The number of electrons surrounding the nucleus of an
atom is equal ...
Understanding the Atom GN
... When atoms of the same element have different numbers of neutrons they are called
Most elements have ______________________ isotopes.
Mass Number - ________________________________________ ...
... Proton – positive charged particle
Neutron - neutral charged particle w/ = mass
Ch. 4: Atoms and the Periodic Table – Study Guide
... The first person who suggested that matter was made up of atoms was the Greek philosopher Democritus. The word
atom comes from the Greek word that means “unable to be divided.”
Dalton’s atomic theory stated that every element was made of atoms that could not be subdivided, atoms of the same
BC1 Atoms Unit Standards
... Explain the arrangement of the elements on the Periodic Table,
including the significant relationships among elements in a
given column or row. (Determine an element’s placement on
periodic table based on properties, number of protons, or
Create visual models for atoms of dif ...
... Symbol Z. the number of protons in the nucleus of
an atom. The atomic number is equal to the
number of electrons orbiting the nucleus in a
The Chemical Basis of Life Chapter 4
... The Atom
• The atom is the smallest part of an
element that retains all the characteristics
of that element.
• A Greek scientist named Democritus was
one of the first to propose that all matter
was composed of tiny particles called
– Units 5-7 Review Honors Chemistry Unit 5
... State the general characteristics of three major families: the noble gases, the
alkali metals and the halogens.
State the trends in physical and chemical properties across a given row
of the periodic table. Include:
metallic vs. nonmetallic characteristics
attraction for electro ...
Atomic Theory - rlhonorschem4
... »Grams- way to measure how
much an element weighs
»Moles- Unit of measure to
measure elements on the
»Molecules- small particles that
make up living and nonliving
WHAT YOU NEED TO KNOW Electron Configurations Explain the
... Explain the relationship between energy levels and sublevels and atomic
Describe the shapes of the s & p orbitals.
Recall the reason for the x, y, z, axes.
Apply the Pauli exclusion principle, the aufbau principle, and Hund’s rule to
write electron configurations using orbital diag ...
What is the history of chemistry and elements
... • 1860’s he arranged elements according to
physical and chemical properties
• Arranged table so that atomic masses increased
moving down each vertical column
• Predicted new elements where empty spaces in
the pattern of periodic table
Modern Periodic Table
• Organized by properties and atomic number ...
Chapter 4 Study Guide Physical Science 1. The word atom comes
... 4. Carbon is found in group ______ of the periodic table.
5. Bohr’s model of the atom compares electrons to ____________________.
6. Elements that are found on the “stair case” are known as ___________.
7. The order of elements in the periodic table is based on the number of
____________________ in ...
Thursday, October 31, 2013 D-day
... • Radioactive Elements- no naturally occurring
stable isotope (what is an isotope?).
– These elements loose neutrons and protons and
emit them as particles.
– All manmade elements are radioactive.
Periodic Table Vocabulary Periodic Table – a chart that organizes
Inert – elements and/or compounds that when put together are unable to react
The Law of Conservation of Matter – a scientific law that states that during a
chemical reaction, matter cannot be created or destroyed but can be changed into a
Period law- The chemica ...
Extended periodic table
An extended periodic table theorizes about elements beyond element 118 (beyond period 7, or row 7). Currently seven periods in the periodic table of chemical elements are known and proven, culminating with atomic number 118. If further elements with higher atomic numbers than this are discovered, they will be placed in additional periods, laid out (as with the existing periods) to illustrate periodically recurring trends in the properties of the elements concerned. Any additional periods are expected to contain a larger number of elements than the seventh period, as they are calculated to have an additional so-called g-block, containing at least 18 elements with partially filled g-orbitals in each period. An eight-period table containing this block was suggested by Glenn T. Seaborg in 1969. IUPAC defines an element to exist if its lifetime is longer than 10−14 seconds, which is the time it takes for the nucleus to form an electronic cloud.No elements in this region have been synthesized or discovered in nature. The first element of the g-block may have atomic number 121, and thus would have the systematic name unbiunium. Elements in this region are likely to be highly unstable with respect to radioactive decay, and have extremely short half lives, although element 126 is hypothesized to be within an island of stability that is resistant to fission but not to alpha decay. It is not clear how many elements beyond the expected island of stability are physically possible, if period 8 is complete, or if there is a period 9.According to the orbital approximation in quantum mechanical descriptions of atomic structure, the g-block would correspond to elements with partially filled g-orbitals, but spin-orbit coupling effects reduce the validity of the orbital approximation substantially for elements of high atomic number. While Seaborg's version of the extended period had the heavier elements following the pattern set by lighter elements, as it did not take into account relativistic effects, models that take relativistic effects into account do not. Pekka Pyykkö and B. Fricke used computer modeling to calculate the positions of elements up to Z = 184 (comprising periods 8, 9, and the beginning of 10), and found that several were displaced from the Madelung rule.