Chemistry - Periodic Law and Electron Shielding

Mendeleev organized the chemical elements based on their

• symbols.

• properties.

• atomic numbers.

• charges.

A horizontal row in the periodic table is called a(n)

• family.

• group.

• octet.

• period.

Which of the following elements is most similar in behavior to calcium?

• magnesium

• sodium

• sulfur

• chlorine

Which periodic group or family of elements is not correctly matched with its common family name?

• Group 2: alkaline-earth metals

• Group 3: alkali metals

• Group 17: halogens

• Group 18: noble gases

The electron configurations of main-group elements end in

• d and f orbitals.

• s and p orbitals.

• s and d orbitals.

• p and d orbitals.

Which of the following elements is a transition metal?

• calcium

• iron

• sodium

• sulfur

All the alkali metal elements are found on the periodic table in

• Group 1.

• Group 2.

• Period 1.

• Period 2.

A measure of the ability of an atom in a chemical compound to attract electrons from another atom in the compound is called

• electron affinity.

• electron configuration.

• electronegativity.

• ionization potential.

Which of the following elements has the greatest atomic radius?

• Al

• S

• Si

• C

Which of the following elements has the lowest electronegativity?

• C

• F

• Li

• O