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English 17 Public

8.5C Periodic tables

Study Slideshow

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

these atoms have full outershells.

15

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

They all have the number of energy levels/shells.

20

Why is the group alkali metals the most reactive metals?

Alkali metals only have one valence electron.

10

A researcher wants to experiment with an element that reacts like sulfur (S) but has a greater atomic mass. Which elements should the researcher select for the experiment?

Selenium, Tellurium, Polonium

25

What is the family group # and period for this element?

group 5. period 2

15

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

A. the number of valence Electrons

15

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

They are anxious to fill their last spot on their outershell.

15

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

A. they have similar chemical properties

20

Based on the Periodic Table, which of the following elements has physical and chemical properties most like potassium? A Sodium B Calcium C Bromine D Neon

A. Sodium

15

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

C. Both have 6 valence electrons

15

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

D. Either Shiny or Dull

15

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

C. Brittle, dull, insulator

15

What color is the blue section of the periodic table.

The Metals

15

Valence Electrons determie the __________________ .

Chemical Properties or Reactivity of the atom.

15

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

Sodium and magnesium have different numbers of valence electrons.

15

What must be true of the element represented by the "X"? A It will have 6 total electrons. B It will have chemical properties similar to C. C It will have 28 protons. D It will have a mass greater than 30.

B. It will have chemical properties similar to C.

15