Periodic Table

Q: Which of the following pairs of elements does not have approximately the same electronegativity?

(a) :  C, S
(b) :  CO, Ni
(c) :  B, AL
(d) :  U, Pu
(e) :  None of the Above
Answer:  B, AL
Explanation:  

Q: The first scientist to publish on the periodic table was:

(a) :  Moseley
(b) :  Dalton
(c) :  Mendeleev
(d) :  Newland
(e) :  None of the Above
Answer:  Mendeleev
Explanation:  

Q: Which of the folowing best describes ionization energy?

(a) :  Energy needed to remove the most loosely bound electron from its ground state.
(b) :  It is representrd by X + e⁻→ X⁻ + energy.
(c) :  It decreses from left to tight across the oeriod.
(d) :  It increases down the periodic table.
(e) :  None of the Above
Answer:  It increases down the periodic table.
Explanation:  

Q: Which statement about all noble gases is correct?

(a) :  The number of protons in the atoms equals the number of neutrons.
(b) :  Their atoms each have a stable arrangement of electrons.
(c) :  They exist as molecules containing two atoms.
(d) :  None of the above
(e) :  None of the Above
Answer:  None of the above
Explanation:  

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