Periodic Table for 8th Grade-1

35 protons in each atom

similar physical and chemical properties to helium (He)

• an element in group 18

• an element period 1

• an element in group 17

15 electrons in each neutral atom

Tags

NGSS.MS-PS1-1

An element in the group containing the most reactive metals

• an element in group 18

• an element in group 1

• an element in period 4

An element in the same period as calcium (Ca)

• Strontium (Sr)

• Magnesium (Mg)

• iron (Fe)

an element with the same number of valence electrons as chlorine (Cl)

• Fluorine (F)

• Argon (Ar)

• Sulfur (S)

Similar properties to Li and K, but larger atomic mass than both

• H

• Rb

• Ca

54 protons in each atom

Tags

NGSS.MS-PS1-1

An element that has 3 energy levels around each atom

• Boron (B)

• Scandium (Sc)

• Sodium (Na)

An element with properties of both metals and nonmetals

• Boron (B)

• Iron (Fe)

• Radon (Rn)

• Zinc (Zn)