Chemistry Periodic Table

_________ is the most reactive of the alkali metals.

• potassium

• lithium

• sodium

• francium

Elements in the same period have the same _____.

Tags

NGSS.HS-PS1-1

This family contains elements that all have two valence electrons

• alkali metals

• noble gases

• alkaline earth metals

• halogens

A(n) _____ is an atom that has a positive or negative charge.

Which element is the most reactive?

• chlorine

• fluorine

• iodine

• carbon

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

What element in the second period has the largest atomic radius?

• lithium

• magnesium

• aluminum

• silicon

What family of metals is the most reactive?

• noble gases

• transition metals

• alkali metals

• alkaline earth metals

This group contains the most reactive non metals

• noble gases

• halogens

• transition metals

• alkali metals

Going down a group the atomic radius _____________________.

• free choice

• stays the same

• decreases

• increases

What did Mendeleev use to organize the periodic table?

• Atomic number

• atomic mass

• # of protons

• # of electrons