Phy Sci 6ed Chap 4 Review

From top to bottom down a column on the periodic table, what happens to the atomic radius of elements?

• generally, atomic radius increases downwards

• generally, atomic radius decreases downards

• there is no trend for atomic radius on the periodic table

From top to bottom down a column on the periodic table, what happens to the element's electronegativities?

• electronegativity increases downard

• electronegativity decreases downard

• there is no top to bottom trend for electronegativity

Answer explanation

Atomic radius affects electronegativity since, as an atom's radius increases, the distance of its valence electrons from its nucleus increases. Electrons that are further from the nucleus have less pull exerted on them, resulting in a lower electronegativity.

ON the basis of where it is on the periodic table, which of the following is true of Krypton

• It is a nonmetal

• It is found in period 5

• It has 18 valence electrons

• it is a noble gas, so it is chemically inert

Refer to a periodic table. Draw the electron dot notation for sulfur

Answer explanation

How does the atomic radius of elements change from left to right across the periodic table

• atomic radius generally decreases left to right

• atomic radius generally increases left to right

• atomic radius does not have a trend left to right

How many valence electrons does Silicon have?

• 8
• 6
• 4
• 2

How many valence electrons does Barium have?

• 2
• 4
• 6
• 8

How many valence electrons does Bromine have?

• 6
• 7
• 10
• 8

Refer to a periodic table, would you expect Antimony or Iodine to act more like a nonmetal?

• They are equally non-metallic

• Iodine
• Antimony
• Impossible to tell

Answer explanation

Elements on the table that are physically further away to the right from the heavy stairstep line that represents the metalloids are more nonmetallic. Elements that are more leftward on the table will act more metallic.

What can we know about all the elements in the same group/family?

• they have the same number of valence electrons

• they have the same electronegativity

• the have the same atomic radius

• all of the these are true