Why are noble gases nonreactive/ stable/ or least reactive?

What period is this element in?

Why is the group alkali metals the most reactive metals?

Based on the periodic table what do you know about these elements?

What characteristic of an element is the best indicator for determining what other elements it will react with? a. The number of valence electrons of the element b. The atomic mass of the element c. The number of neutrons of the element

Which of the following is true for elements listed in the same column of the periodic table? A have similar chemical properties. B have the same number of protons. C mass of their atoms are similar. Datoms are the same size

Valence Electrons determie the __________________ .

Which of the following lists of properties best describes nonmetals? A. brittle, shiny, conductor B. malleable, shiny conductor C. brittle, dull, insulator D. Malleable, dull, insulator

A student hypothesizes that sodium (Na) has different chemical properties than magnesium (Mg). Which of the following statements bests supports this student’s hypothesis?

When metals, nonmetals, and metalloids are compared according to luster, which is the best description of the appearance of metalloids? A. Dull B. Shiny C. Powdery D. Either shiny or dull

What common property do sulfur and oxygen have in common? A Both are metals B Both are gases C Both have 6 valence electrons D Sulfur and oxygen do not have a common property

Why is this family, the Halogens, the most reactive NONMETAL family?