05.2 Periodic Trends #2 (H)

The ionization energies for the unknown element X are listed in the table above. On the basis of the data, element X is most likely to be which of the following.

• Na

• Al

• Mg

• Si

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

An unidentified element has many of the same physical and chemical properties as Magnesium (#12) and Strontium (#38) but has a smaller atomic radius than either of these elements. What is the most likely identity of this element?

• Sodium (#11)

• Beryllium (#4)

• Rubidium (#37)

• Barium (#56)

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Electronegativity __________ from left to right within a period and __________ from top to bottom within a group.

• decreases, increases

• increases, increases

• increases, decreases

• stays the same, increases

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

What is the final or ending electron configuration for the element in group 15 period 5?

• 5p³

• 3d⁵

• 4d⁵

• 5p¹⁵

Tags

NGSS.HS-PS1-1

The atomic radius of main-group elements generally increases down a group because why?

• effective nuclear charge increases down a group

• effective nuclear charge decreases down a group

• Coulomb's Law zigzags down a group

• the energy level (n) of the valence orbitals increases

Which one of the following atoms has the largest radius?

• O

• N

• F

• Ne

A new element has been discovered and if you can correctly determine the group it belongs to, they will name it after you! It exists as a solid at room temperature; it has a high melting point and has two electrons in its outermost energy level (ns²). In what group, on the periodic table, should this

• Group 1

• Group 18

• Group 17

• Group 2

Tags

NGSS.HS-PS1-1

An unidentified element has many of the same physical and chemical properties as Potassium (#19) and Cesium (#55) but has a lower atomic mass than either of these elements. What is the most likely identity of this element?

• Beryllium (#4)

• Sodium (#11)

• Rubidium (#37)

• Barium (#56)

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

The ability of an atom in a molecule to attract electrons is best quantified by the __________.

• diamagnetism

• electronegativity

• first ionization potential

• electron change-to-mass ratio

Of the atoms below, __________ is the most electronegative.

• Cl

• Rb

• Ca

• S

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2