Chemistry Day 1

Are you ready to start the school year?

• Yes! I’m ready to learn.

• No. Summer break went by too fast

• Maybe. I’m a little nervous about the new grade level

Lithium is in Group 1A Period 2 of the periodic table which statement describes the charge of the ion it typically forms

• It forms a cation with +2 charge.

• It forms an anion with a +1 charge.

• It forms a cation with a +1 charge.

• It forms an anion with a −1 charge.

(K, Se, Ca, Kr, and Ga) in the Periodic Table. Which arrangement, orders them from largest to smallest atomic size

• K; Ca; Se+; Kr; Ga

• K; Kr; Se; Ca; Ga

• Ca; Ga; K, Kr; Se

• K; Ca; Ga; Se; Kr

Cations are always ____ than the parent atom and anions are always ____ than the parent atom

• smaller; larger

• smaller; smaller

• larger; larger

• larger; smaller

Based on their definitions, electron affinity could be considered the opposite of

• nonmetallic character.

• shielding effect.

• ionization energy.

• effective nuclear charge.

Which statements are true concerning elements in the same group of the periodic table? Select all that apply.

• They are either all solids or all liquids or all gases.

• They have similar periodic properties.

• They have the same number of inner core electrons.

• They are all metals or nonmetals, but not both.

• They have the same outer shell electron configuration.

An element has 81 protons and an estimated effective charge of +3. the element has ____ core electrons and in group ____

• 78, 3A

• 81, 5A

• 84, 3A

• 78, 5A