Chemistry Help!?

Question

Can someone answer these questions for me??

Which trend decreases as you move up a group and across a period from left to right?
atomic nucleus
electronegativity
ionization energy
atomic radius


Which trend decreases for metals down a group?

atomic radius
reactivity
melting point
None of the above are correct.




Which of the following is least reactive?

gallium
chromium
calcium
potassium

The melting point for metals generally _______ as you go down a group.
increases
stays the same
decreases
gets all wiggly


The atomic radius is generally ______ than the ionic radius of a Non-Metal.

smaller
larger
the same
None of the choices are correct.



Atomic size generally _______ as you go down a group.

decreases
stays the same
increases
All of the above.

On the periodic table, protons increase:

bottom to top.
left to right.
right to left.
There is no pattern

Answer 1

as we go frm left 2 right metallic character decrases,ionisation enthalpy incerases no of protons increases,atomic radii decreases,atomic charge increases,reactivity incerases

as we go frm top to bottom atomic size increases,ionisation enthalpy decreases,charge decreases,electronegativity decreases

Answer 2

I tell you what you should do. There are a TON of good periodic tables on the 'net. Many of them list atomic radius and electronegativity and some list ionic radii and ionization potential, etc. The easiest one to see the trend of is the number of protons, since that is equal to the atomic number. I will tell you that atomic radius trends are to get larger down groups and smaller across periods, while electronegativity will get lower down a group and higher across periods (left to right). Consult your chemistry book chapters on atomic structure and periodic properties to determine the answers to the other questions. Most of these properties tie directly to the electronic configurations of the elements and their relationships to the effect of the protons in the nucleus. (This is a hint about ionic radii and charge) Sorry I can't help more, but it sounds like you've got a big homework assignment or test to worry about and my answer would be more like a recitation of my lecture notes from the last week or so. Good luck!

Answer 3

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Answer 4

are you alright?? or gone mad??