Periodic Families & Trends

Elements in the same group or column have the same ...

• # of valence electrons

• # of shells

• # of protons

• Mass Number

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which properties are characteristic of the Group 1 metals?

• high reactivity and the formation of unstable compounds
• low reactivity and the formation of unstable compounds
• high reactivity and the formation of stable compounds
• low reactivity and the formation of stable compounds

Tags

NGSS.HS-PS1-2

Noble gases are inert because

• They are highly reactive

• They are unreactive

• They are noble

• They have 8 electrons in their outer most energy level

Tags

NGSS.HS-PS1-1

The table above contains a list of properties for an unidentied element, X. Based on the properties in the table, to which of the following groups from the periodic table does element X most likely belong?

• 1 (1A)

• 2 (2A)

• 14 (4A)

• 16 (6A)

Tags

NGSS.HS-PS1-1

Which pair of elements has the most physical and

chemical properties in common?

• Ge and Se

• K and Kr

• Al and Ga

• Ba and Bi

Tags

NGSS.HS-PS1-1

As you move down the periodic table atoms get bigger.  This is because ____________.

• The atoms have more mass.
• The atoms have more protons.
• The atoms have more energy levels
• The atoms have more nuetrons

As you move across the periodic table atoms tend to get smaller because, ______________.

• the atoms have more mass.
• the atoms have less mass
• the atoms have more protons.
• the atoms have less electrons.

Which atom has the largest atomic radius?

• potassium (K)

• rubidium (Rb)

• francium (Fr)

• cesium (Cs)

Ionization energy _________ as you go down a group.

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Ionization energy _________ as you go across a period.

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2