Unit 5 Periodic Law Review

How did chemists begin the process of organizing the elements?

• They used the properties of elements to sort them into groups.
• They used the properties of elements to sort them into periods.
• They used the atomic masses to sort them into groups.
• They used the atomic masses to sort them into periods.

What property did Mendeleev use to organize his periodic table?

• Atomic mass
• Atomic number
• Atomic radius
• First ionization energy

How are elements arranged in the modern periodic table?

• In order of increasing atomic number
• In order of increasing atomic weight
• In order of increasing atomic radius
• In order of increasing density

Which of the following is NOT one of the three broad classes of the elements?

• Metals
• Nonmetals
• Transitional metals
• Metalloids

Silicon is a

• Metal
• Metalloid
• Nonmetal
• Real planet

Tags

NGSS.HS-PS1-1

How do the electron configurations of all halogens end? (Recall that "n" refers to the period that the element is in.)

• ns^1
• ns^2
• np^5
• np^6

Tags

NGSS.HS-PS1-1

Which group of elements rarely take part in chemical reactions?

• Noble gases
• Alkali metals
• Alkaline earth metals
• Halogens
• Pnictogens

Which block can cesium be found?

• s
• p
• d
• f

Which of the following is a transition metal?

• Sulfur
• Bromine
• Helium
• Copper
• Radium

Magnesium is a(n)

• Alkaline earth metal
• Alkali metal
• Halogen
• Noble gas
• Transition metal

Tags

NGSS.HS-PS1-1