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Chp 5 Periodic Table
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How many shells does H have
1
How many electrons in the outer shell of Ca
2
How many electrons in the outer shell of Ne
8
Which element of Group VII is the most reactive one?
Fluorine
True or false: The atomic number of Gold is 75
False, it's 79
Diamonds are the pure form of this element ________________.
Carbon
Atoms with similar properties are located in the same _________.
group or family
One property from alkali metals is __________.
Only one electron, reactive, soft, shiny
Give me an example of a halogen.
Bromine, Fluorine, Chlorine, Iodine, Astatine
What part of the atom is letter D pointing at?
Shell
What part of the atom is letter C pointing at?
Proton
What part of the atom is letter A pointing at?
Nucleus
What period is this element in?
Period 3
Valence Electrons determie the __________________ .
Chemical Properties or Reactivity of the atom.
What color is the blue section of the periodic table.
The Metals
What is the family group # and period for this element?
group 5. period 2
What are the characteristics of nonmetals?
dull, poor conductors of electricity
..................discovered that the nucleus of the atom contains positively charged protons.
Rutherford
the number of protons + neutrons in the atom
mass number
is the number of protons in the nucleus
atomic number
What group of elements are the least reactive?
Noble gases
What are 2 properties of metals?
Good conductor for electricity/thermal energy, high density, malleable, high melting points
what group and period is oxygen in
group 6, period 2
what group is calcium in
2
groups tell us how many..
electrons on the outer shell
periods tell us how many..
shells an element has
elements in the same group tend to have similar..
properties
a horizontal row in a periodic table is called...
a period
the vertical coloumn of the periodic table is called..
a group