41 Answered Questions for the topic Periodic Table
Periodic Table Chemistry
07/18/17
Periodic Elements related doubt
why are the 4 elements in the periodic table have not been found?
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Periodic Table Chemistry
11/15/16
Periodic Table related doubts
If the ionic radii of each K+ and F– are 1.34Å, then the atomic radii for K and F will be
List an element that fits in each of the following groups.
Halogen =
Alkali metal =
Lanthanide series =
Transition metal =
Chalogen =
Noble gas =
Alkaline Earth metal =
Actinide series =
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10/22/16
How are potassium-39, potassium-40, and potassium-41 different from each other? Write the isotope symbol for each?
How are potassium-39, potassium-40, and potassium-41 different from each other? Write the isotope symbol for each?
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Periodic Table
10/11/16
The ionisationenergy and electron affinity of an element are 13.0eV and 3.8eV Its electronegativity??
here are the options
2.8
3.0
3.5
4.0
please do show the steps to solve the problem too...
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Periodic Table Chemistry
01/12/16
Why is the 2nd ionization energy of Aluminum higher than that of Silicon?
According to the ionization energy periodic table trend, silicon's should be higher but its.
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Periodic Table
10/02/15
Why does electronegativity increase as effective neutral charge increases?
I know that electronegativity is the ability to attract shared electrons and that effective neutral charge is the pull of the nucleus on outer electrons based on my notes. But I'm not really sure...
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09/22/15
Ionic Size
I really don't understand what this is asking... please help.
1.) As you move left to right across the period, there are two elements that instead show a decrease in ionization energy. Identify...
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To which group in the periodic table does element M belong?
A certain element M is a main group metal that reacts with chlorine to give a compound with the chemical formula MCl2 and oxygen to give the compound MO. To which group in the periodic table does...
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How do I calculate the number of protons and neutrons for a fictitious element when only given the atomic weight?
I have a list of fictitious elements to put into a periodic table (of my own design). I have the atomic weight, physical state (gas, diatomic gas, hard brittle solid, ,hard w/high melting point,...
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05/22/15
which list of elements contains only metal?
- helium, carbon, gold
- sodium, chromium, copper
- iodine, iron, nickel
-phosphorous, nitrogen, oxygen
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Periodic Table Chemistry
05/20/15
as you move left to right across a period does what does the number of valence electrons do?
-increases
-stays the same
-decreases
-increase & then decrease
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Periodic Table
03/03/15
Within a period, what happens to the atomic radius as the atomic nuber increases? Why?
My super intelligent chemistry teach told me that my answer could NOT have directions in it or else no exception s and it will absolutely be mark wrong and this question is worth more than half of...
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What are some negative effects of adding Chromium and/or Manganese to Steel?
ANY negative effects at all
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Periodic Table
01/05/14
how to complete a table using f(x) = ^2
I do not understand how to complete this table. Would you show me how to get started. thanks
f(x) = x^2 x = 0 + 1 ...
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