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Atoms and The Periodic Table Review
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What does the term "cation" mean?
A positively charged atom that has lost electrons.
Which atom has a greater atomic radius- arsenic or bromine?
arsenic; it is farther left that bromine
Explain how to write an abbreviated electron configuration.
Located the noble gas that comes in the period before the desired atom, write its symbol in brackets, and count/summarize each orbital section until finished.
In which orbital block is tin found?
p
Which types of atoms are poor conductors, dull, and found to the right of the staircase?
nonmetals
Which type of atoms are shiny, good conductors, and found to the left of the staircase?
metals
What does the group number tell about an atom?
The number of valence electrons present.
What is unique about the elements in group 18?
They have 8 valence electrons, so they are stable and will not readily form bonds with other atoms.
What is the name for group 18 elements?
Noble Gases
What is the name for group 17 elements?
Halogens
What is the name for the group 2 elements?
Alkaline Earth Metals
What is the name for the group 1 elements?
Alkaline Metals
What is a row on the periodic table called?
period
What is a column on the periodic table called?
group or family
What are valence electrons?
Electrons that are found in the outermost energy level of an atom.
What are the smaller particles called that make up both protons and neutrons?
quarks
Fill in the missing information.
Boron Atomic #- 5 Atomic Mass- 11 # protons- 5 # neutrons- 6 # electrons- 5
What is the most common isotope for the following atom. Explain how you know.
Na-23; The average atomic mass is 22.9, which would round to 23. Sodium is most commonly found with a mass of 23.
Which isotope is represented by the Bohr model in the picture. Give the symbol and mass number for the isotope.
Mg-24
Draw a Bohr model for an atom of Na-23.
See instructor drawing. (11 protons, 12 neutrons, 11 electrons, 3 electron shells-2 electrons in shell 1, 8 electrons in shell 2, and 2 electrons in shell 3)
How many electrons can fit into the following energy levels (shells): 1, 2, 3?
1- two electrons 2- eight electrons 3- eight electrons
What is an ion?
A charged atom.
What is an isotope?
Atoms of the same element with different masses.
How is mass number for an atom determined?
number of protons + number of neutrons OR atomic number + number of neutrons
How is the number of protons for an atom determined?
Look at the atomic number on the periodic table.
What is the charge of an electron?
-1
What is the charge of a neutron?
0 (neutral)
What is the charge of a proton?
+1
Which particles are found in the cloud that surrounds the nucleus?
electrons
Which particles are found in the nucleus?
protons and neutrons
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