Question

question 44 (1 point)
which statement is true about electronegativity?
electronegativity generally increases from left to right across a period.
electronegativity generally is higher for metals than for nonmetals.
electronegativity generally increases as you move from top to bottom within a group.
electronegativity is the ability of an anion to attract another anion.

question 45 (1 point)
compared with the electronegativities of the elements on the left side of a period, the electronegativities of the elements on the right side of the same period tend to be _
unpredictable
the same
higher
lower

question 46 (1 point)
which of the following decreases with increasing atomic number in group 2a?
ionization energy
number of electrons
shielding effect
ionic size

Explanation:

• Question 44:
• Electronegativity generally increases from left to right across a period. Non - metals (on the right of the periodic table) have higher electronegativity than metals (on the left). Electronegativity decreases from top to bottom in a group. Electronegativity is the ability of an atom in a chemical bond to attract electrons (not an anion attracting another anion).
• Question 45:
• As we move from left to right across a period, the electronegativity of elements increases. This is because the effective nuclear charge increases, and the atoms have a greater tendency to attract electrons.
• Question 46:
• In Group 2A, as the atomic number increases (i.e., as we move down the group), the ionization energy decreases. The number of electrons increases (since atomic number = number of electrons for neutral atoms). The shielding effect increases (more inner electron shells). The ionic size also increases (larger electron shells).

Answer:

• Question 44: A. Electronegativity generally increases from left to right across a period.
• Question 45: C. higher
• Question 46: A. ionization energy