Periodic Table Periods

What are the horizontal rows (left and right) in the periodic table called?

• Families

• Groups

• Periods

• Orbitals

As you go left to right within the same period (row) which of the following is true? (Select all that apply)

• The atomic number increases by one

• The ionization energy increases

• The size of the atom decreases

• The number of orbitals increases by one

• The number of electrons decreases

Tags

NGSS.HS-PS1-1

Which of the following elements is in period 6?

• I (Iodine)

• H (Hydrogen)

• Ca (Calcium)

• Cs (Cesium)

Tags

NGSS.MS-PS1-1

Which of the following elements are in period 3? (Select all that apply)

• Sodium (Na)

• Aluminum (Al)

• Phosphorus (P)

• Radon (Rn)

• Cesium (Cs)

Which of the following elements are in period 6? (Select all that apply)

• Sodium (Na)

• Aluminum (Al)

• Phosphorus (P)

• Radon (Rn)

• Cesium (Cs)

Where would you find the largest atoms on the periodic table?

• Bottom, left side of the periodic table

• Bottom, right side of the periodic table

• Top, right side of the periodic table

• Top, left side of the periodic table

Elements in period 5 will have...

• 5 orbitals

• 10 valence electrons

• 10 orbitals

• 5 valence electrons

Tags

NGSS.HS-PS1-1

Even though the have the same number of orbitals, why is it that elements within the same period (row) differ in size?

• Elements that have more charge have a stronger attraction between protons and electrons (smaller atom)

• Elements that have less charge have a weaker attraction between protons and electrons (larger atom)

Tags

NGSS.HS-PS1-1

Why are elements near the bottom of the table larger than those near the top?

• Elements at the bottom have more orbitals

• Elements at the top have more orbitals

• Elements at the bottom have more valence electrons

• Elements at the top have more valence electrons

Why are elements near the left of the table larger than those near the right of the table?

• Elements at the left have less charge therefore less of an attraction between protons and electrons allowing the electrons to spread out

• Elements at the left have more orbitals than on the right

• Elements at the right have more valence electrons

• Elements at the right have less charge therefore less of an attraction between protons and electrons allowing the electrons to spread out

Tags

NGSS.HS-PS1-1