IB Chemistry Periodicity

Which factors lead to an element having a low value of first ionization energy?

I. large atomic radius

II. high number of occupied energy levels.

III. high nuclear charge

• I and II only

• I and III only

• II and III only

• I, II and III

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which statement about electronegativity is correct?

• Electronegativity decreases across a period.

• Electronegativity increases down a group.

• Metals generally have lower electronegativity values than non-metals.

• Noble gases have the highest electronegativity values.

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which statement is correct for a periodic trend?

• Ionization energy increases from Li to Cs.

• Melting point increases from Li to Cs.

• Ionization energy increases from F to I.

• Melting point increases from F to I.

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which compound of an element in periodic 3 reacts with water to form a solution with a pH greater than 7?

• SiO₂

• SiCl₄

• NaCl

• Na₂O

Which equation represents the first ionization energy of fluorine?

• F(g) + e^- -> F^-(g)

• F^-(g) -> F(g) + e^–

• F⁺(g) -> F(g) + e^–

• F(g) -> F⁺(g) + e^–

Tags

NGSS.HS-PS1-2

NGSS.HS-PS1-4

Which statement is correct for the halogen group?

• Halide ions are all reducing agents, with iodide ions being the weakest.

• Halogens are all oxidizing agents, with chlorine being the strongest.

• Chloride ions can be oxidized to chlorine by bromine.

• Iodide ions can be oxidized to iodine by chlorine.

Which of the following statements are correct?

I. The melting points decrease from Li-> Cs for the alkali metals.

II. The melting points increase from F -> I for the halogens.

III. The melting points decrease from Na -> Ar for the period 3 elements.

• I and II only

• I and III only

• II and III only

• I, II and III

Tags

NGSS.HS-PS1-1

Which element is a transition metal?

• Ca

• Cr

• Ge

• Se

When Na, K, and Mg are arranged in increasing order of atomic radius (smallest first), which order is correct?

• Na, K, Mg

• Na, Mg, K

• K, Mg, Na

• Mg, Na, K

Tags

NGSS.HS-PS1-1

Which oxides produce an acidic solution when added to water?

I. SiO₂

II. P₄O₆

III. SO₂

• I and II only

• I and III only

• II and III only

• I, II and III