Periodic trends unit 6 test reveiw

Question 1

What is atomic radii?

Answer 1

Distance from the center of the nucleus to the boundary of the e- cloud.

Question 2

Shielding Effect

Answer 2

The inner (core) electrons cause an interference and block the nucleus (p+) from the outer ve-. The more e-=more shielding effect.

Question 3

What is first ionization energy?

Answer 3

The energy required to remove the most loosely held electron.

Question 4

Electronegativity

Answer 4

Attraction an atom has for a bonding pair of electrons (attract e- towards itself).

Question 5

What is reactivity?

Answer 5

How completely and easily an atom bonds to another (lose/gain/share).

Question 6

Ionic size as compared to atom; which ANIONS and what is their trend?

Answer 6

(-), gained e- (not p+). NONMETALS larger because gained e-, e- repel other e- and expand. More (-) = larger anion. Cl is smaller and Cl^- is larger.

Question 7

Ionic size as compared to atom; which CATIONS and what is their trend?

Answer 7

(+), lost e- (not p+), METALS smaller because lost electrons. Nucleus can pull e- in closer. more (+) = smaller cation. Fe is larger than Fe^+3

Question 8

If we make all the atoms ions:

Answer 8

Same trend as atomic radii but it starts over at the staircase.