REVIEWER: Periodic Table of Elements

How many elements are currently in the periodic table of elements?

• 110

• 115

• 118
• 120

Boron is a metalloid.

• Unknown
• Maybe
• True
• False

IDENTIFY THE ELEMENT. A nonmetal in p-block, period 4, group 17.

• Bromine (Br)

• Chlorine (Cl)

• Tin (Sn)

• Argon (Ar)

IDENTIFY THE ELEMENT. A metal in d-block, period 5, group 7 widely used in imaging the heart.

• Sodium (Na)
• Iron (Fe)
• Oxygen (O)
• Technetium (Tc)

IDENTIFY THE ELEMENT. An element with a valence of 2 among the noble gases.

• Neon
• Helium
• Argon
• Oxygen

Which element has a bigger atomic radius, Niobium (Nb) or Cesium (Cs)?

• Cesium (Cs)
• Niobium (Nb)

IDENTIFY THE ELEMENT. The last element in the f-block, actinide series.

• Einsteinium (Es)
• Americium (Am)
• Californium (Cf)
• Lawrencium (Lr)

IDENTIFY THE ELEMENT. A metal in the boron family in period 3, group 13.

• Aluminum (Al)

• Gallium (Ga)

• Indium (In)

• Thallium (Tl)

Phosphorus (P) has a valence of 6.

• True
• False

Rubidium (Rb) has a valence of 1.

• True

• False