U1: Periodic Trend Mastery Test

In the process of ionization, what is the relationship between the second ionization energy (I₂) and the third ionization energy (I₃)?

• I₂ > I₃

• I₂ < I₃

• I₂ = I₃

• There is no way to predict this relationship.

Looking across period 4 of the periodic table, potassium (atomic number 19) is followed by calcium (atomic number 20), which is followed by scandium (atomic number 21). Which element should have the largest atomic radius?

• potassium

• calcium

• scandium

• All three have the same atomic radius.

Tags

NGSS.HS-PS1-1

Consider the group 1A elements sodium (period 3), potassium (period 4), and rubidium (period 5). What would you predict about the ionization energies of these elements?

• Na < K < Rb

• Na > K > Rb

• Rb < Na < K

• Na = K = Rb

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Consider the group 1A element sodium (atomic number 11), the group 3A element aluminum (atomic number 13), and the group 7A element chlorine (atomic number 17). These elements are in period 3. How are the first ionization energies of these elements related?

• sodium > aluminum > chlorine

• sodium < aluminum < chlorine

• sodium < chlorine < aluminum

• sodium > chlorine > aluminum

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

The sodium atom loses an electron to form a sodium ion (Na⁺). Which statement is correct with respect to its atomic radius?

• The sodium ion has a larger radius than the atom.

• The sodium ion has a smaller radius than the atom.

• The sodium ion and the sodium atom radii are the same size.

• The sodium ion has twice the radius of the sodium atom.

Which property determines an atom's ability to attract electrons shared in a chemical bond?

• ionization energy

• atomic radius

• electronegativity

• ionic radius

Which of these elements in group 1A has the largest atomic radius?

• cesium

• rubidium

• potassium

• sodium

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Select the correct answer. Which element in period 4 has the highest electronegativity?

• potassium

• calcium

• copper

• bromine

Tags

NGSS.HS-PS1-1

Select the correct answer. Which group 4A element has the highest ionization energy?

• carbon

• silicon

• tin

• lead

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which group 2A element has the largest ionic radius?

• magnesium

• calcium

• barium

• radium

Tags

NGSS.HS-PS1-1