Question

exit ticket: the periodic table
directions: answer the questions below

1. all of the following would classify an element as a metal except?

a. dull
b. malleable
c. luster
d. hard

1. which element is a metalloid?

a. titanium
b. potassium
c. selenium
d. polonium

1. which element is least likely to conduct heat and electricity?

a. o
b. si
c. po
d. ca

Explanation:

1. Metals have properties like malleability (ability to be shaped), luster (shiny appearance), and can be hard. Dullness is not a property of metals.
2. Metalloids have properties intermediate between metals and non - metals. Selenium is a non - metal, Titanium and Potassium are metals. Polonium has some properties of both metals and non - metals (semi - conductor of heat and electricity, can be shaped into sheets to some extent).
3. Non - metals are least likely to conduct heat and electricity. Oxygen (\(O\)) is a non - metal. Silicon (\(Si\)) is a metalloid (semi - conductor), Polonium (\(Po\)) is a metalloid (semi - conductor), and Calcium (\(Ca\)) is a metal (good conductor).

Answer:

1. a. Dull
2. d. Polonium
3. a. \(O\)