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6.2 Atomic theory - Lighthouse Christian Academy
6.2 Atomic theory - Lighthouse Christian Academy

... • Look at what symbol the element has and write this in the centre. Write the atomic # in front of it at the bottom. • Determine the # of shells needed. Find what row (period) it is in. This will be the # of electron shells. Draw them in. • The atomic # represents the # of electrons (e) needed. Sta ...
PowerPoint 6.2
PowerPoint 6.2

... • Look at what symbol the element has and write this in the centre. Write the atomic # in front of it at the bottom. • Determine the # of shells needed. Find what row (period) it is in. This will be the # of electron shells. Draw them in. • The atomic # represents the # of electrons (e) needed. Sta ...
Chemistry Timeline
Chemistry Timeline

...  Four elements  Invented a good atomic theory (list all points)  Matter is made up of “atomos” For each person include in a TYPED paragraph: 1. The name of the scientist with birth and death dates (as known). In other words, WHEN. 2. A complete explanation of their contribution to the understandi ...
physics - Keith E. Holbert
physics - Keith E. Holbert

... N: neutron number (the number of neutrons), and A=N+Z: atomic mass number (the number of nucleons). Definitions and Distinctions • atomic mass number (A) [integer number] vs. atomic weight or atomic mass (M) [real value]: M≅A • isotope: nuclides with equal number of protons, but different numbers of ...
ch19 - Otterville R-VI School District
ch19 - Otterville R-VI School District

... Niels Bohr (1913)  Bright-Line Spectrum ...
S3 Chemistry - eduBuzz.org
S3 Chemistry - eduBuzz.org

...  Identify whether a species has an equal or unequal number of protons and electrons and use this to state whether it is an atom or ion.  State the charge of an ion.  Calculate the charge on a ion using nuclide notation  Use the periodic table to identify whether an element is a metal or non-meta ...
Matter
Matter

... electron is likely to be found. Each energy levels can hold only a limited number of electrons. The smallest, innermost energy level can hold only two electrons. The second energy level can hold up to eight electrons. The third energy level can hold up to 8 electrons. The 4th & 5th can hold up to 18 ...
Fall Semester Review Packet
Fall Semester Review Packet

... variable and a control. Describe how these variables relate to one another during an experiment. 12. Explain the difference between accuracy and precision when describing scientific measurements. 13. Explain how atoms of the same element may differ. Include all of the following terms in your explana ...
PowerPoint - Models of the Atom
PowerPoint - Models of the Atom

... • Atoms of the same element that have different numbers of neutrons are called isotopes. • Due to isotopes, mass #s are not round #s. • Li (6.9) is made up of both 6Li and 7Li. • Often, at least one isotope is unstable. • It breaks down, releasing radioactivity. • These types of isotopes are called ...
Workshop - History of Atomic Theory
Workshop - History of Atomic Theory

... • Atoms of the same element that have different numbers of neutrons are called isotopes. • Due to isotopes, mass #s are not round #s. • Li (6.9) is made up of both 6Li and 7Li. • Often, at least one isotope is unstable. • It breaks down, releasing radioactivity. • These types of isotopes are called ...
PowerPoint - Models of the Atom
PowerPoint - Models of the Atom

... • Atoms of the same element that have different numbers of neutrons are called isotopes. • Due to isotopes, mass #s are not round #s. • Li (6.9) is made up of both 6Li and 7Li. • Often, at least one isotope is unstable. • It breaks down, releasing radioactivity. • These types of isotopes are called ...
atomic models
atomic models

... • Atoms of the same element that have different numbers of neutrons are called isotopes. • Due to isotopes, mass #s are not round #s. • Li (6.9) is made up of both 6Li and 7Li. • Often, at least one isotope is unstable. • It breaks down, releasing radioactivity. • These types of isotopes are called ...
The Atomic Model - Mr. Brown`s Science Town
The Atomic Model - Mr. Brown`s Science Town

... Doesn’t define an exact path of electron; estimates probability of finding electron in a certain location Uses atomic orbitals = a 3-D region around nucleus that describes the electron’s probable location. ...
Labs - newtunings.com
Labs - newtunings.com

... 3.2a A physical change results in the rearrangement of existing particles in a substance. A chemical change results in the formation of different substances with changed properties. 3.2b Types of chemical reactions include synthesis, decomposition, single replacement, and double replacement. 3.2c T ...
atoms of different elements differ in size, mass
atoms of different elements differ in size, mass

...  Atoms cannot be subdivided, created, or destroyed  Atoms of different elements combine in simple whole-number ratios to form chemical compounds  In chemical reactions, atoms are combined, separated, or rearranged ...
Midterm Review Packet - Mrs. McKenzie`s Chemistry and ICP Classes
Midterm Review Packet - Mrs. McKenzie`s Chemistry and ICP Classes

... 1. The atomic number of an element is __________________________? Does this number ever change for atoms of the same element? 2. The atomic mass number of an element is ___________________________? If this number changes for an atom of a specific element you have an (ion, isotope) __________________ ...
Chapter 2 Outline 3rd PERIOD
Chapter 2 Outline 3rd PERIOD

...  There are 2 ways to identify elements: atomic number and atomic mass number  Every element is given a number (atomic number) that is equal to the number of protons the atoms contain  The atomic mass number of any atom is the sum of the protons and neutrons in the nucleus  Atomic Weight: atoms o ...
Unit 2: All Biology is Chemistry
Unit 2: All Biology is Chemistry

... Isotopes are atoms of the same element that have different numbers of neutrons. – therefore they will have different mass numbers – this is the reason for the average atomic mass in the periodic table Click here to compare these twoare atoms. These two atoms both carbon atoms. But the atom on the le ...
Atoms
Atoms

... • AMU = “atomic mass unit” ...
Atoms - SWThornton
Atoms - SWThornton

... All matter is made up of atoms. All atoms of an element are identical in size, mass, and chemical properties. Atoms of an element are different from atoms of all other elements. Atoms may neither be divided nor destroyed. Atoms may be combined, separated, and rearranged to form new compounds. Atoms ...
Democritus Early Greek philosopher who coined the term atom
Democritus Early Greek philosopher who coined the term atom

... particle found in the nucleus of all conventional atoms. The only place you can find matter without protons is in a neutron star or the core of powerful particle accelerators. The proton has a positive charge, which balances out the negative charge in atoms, electrons. If an atom has an imbalance of ...
10/3/16 Intro Atomic Theories
10/3/16 Intro Atomic Theories

Unit 3 - Chemistry
Unit 3 - Chemistry

... • The sum of the number of neutrons and the number of protons in a given nucleus is called the _______________. • _______________ • atoms with the same number of protons but different numbers of _______________. • Elements on the periodic table are the most common _______________ of those substance ...
Timeline Assignment
Timeline Assignment

... Early Greek philosophers believed all matter was made up of four “elements”  earth, air, water, and fire ...
Electrons and Periodic Trends Summary
Electrons and Periodic Trends Summary

... C. Hund’s
rule:

when
filling
an
energy
level
all
orbitals
MUST
get
one
 electron
before
any
orbital
can
have
two
electrons.
 D. Electron
Dot
Notation:


 Dots
are
used
to
denote
the
outermost
shell
of
electrons.

The
dots
are
 placed
according
to
which
orbital
electrons
they
represent.
 ...
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Unbinilium

Unbinilium /uːnbaɪˈnɪliəm/, also known as eka-radium or simply element 120, is the temporary, systematic element name of a hypothetical chemical element in the periodic table with the temporary symbol Ubn and the atomic number 120. Unbinilium and Ubn 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 alkaline earth metal, and the second element in the eighth period.To date, all attempts to synthesize this element have been unsuccessful. Its position as the seventh alkaline earth metal suggests that it would have similar properties to the alkaline earth metals, beryllium, magnesium, calcium, strontium, barium, and radium; however, relativistic effects may cause some of its properties to differ from those expected from a straight application of periodic trends. For example, unbinilium is expected to be less reactive than barium and radium and be closer in behavior to strontium, and while it should show the characteristic +2 oxidation state of the alkaline earth metals, it is also predicted to show the +4 oxidation state unknown in any other alkaline earth metal.
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