Experience Chemistry Investigation 2 Test Review

A horizontal row in the periodic table is called what?

• a family

• a group

• an octet

• a period

Which group is NOT correctly matched with its name?

• Group 2: alkaline-earth metals

• Group 3: alkali metals

• Group 17: halogens

• Group 18: noble gases

Which of the following elements has the smallest electron affinity?

• Sodium

• Magnesium

• Potassium

• Calcium

Answer explanation

Electron affinity increases left to right across a period and decreases top to bottom.

Sodium and Potassium are in the first group , so their electron affinity is smaller than Calcium and Magnesium. Potassium is lower on the table than sodium, so it is the lowest of the four options.

Which of the following trends decreases left to right across a period?

• electron affinity

• ionization energy

• ionic radii

• none of the above

Which of the following elements has the biggest atomic radii?

• Cs

• Rn

• K

• Kr

Beryllium is located in which block in the periodic table?

• s

• p

• d

• f

Which of the following elements is in the p-block?

• Zn

• Er

• Te

• Y

Strontium is a(n)

• alkali metal

• alkaline-earth metal

• edible element

• transition metal

The most electronegative of all the elements is

• oxygen

• fluorine

• helium

• None of the above

Identify the period of [Ne] 3s¹            

(a)