Question

1. the most useful property of metalloids is their

a. varying ability to conduct electric current
b. brittleness and malleability
c. tendency to be un reactive
d. ability to be pulled out into long wires

1. carbon and other nonmetals are found in which area of the periodic table?

a. on the left - most side
b. on the right side
c. in the middle column of the periodic table
d. in the bottom rows

1. most nonmetals are

a. gases
b. metalloids
c. good conductors
d. shiny

1. which element is a metalloid?

a. carbon
b. sodium
c. silicon
d. uranium

1. metals tend to be

a. gases
b. dull
c. good conductor
d. brittle

1. the elements to the right of the zig - zag line on the periodic table are called

a. metalloids
b. conductors
c. metals
d. nonmetals

1. which is true about metals?

a. they are ductile
b. they are malleable
c. they are good conductors
d. all of these

1. the only metal that is a liquid at room temperature is ____.

a. copper
b. silver
c. mercury
d. sodium

1. what period are the following elements in?

a. he __________
b. ge __________
c. rb __________
d. i __________

1. what group are the following elements?

a. sulfur __________
b. ca __________
c. iodine __________
d. fe __________

1. what is the atomic symbol for silver?

1. what is the atomic mass of mercury?

1. ni is the symbol for what element?

1. the element that has the atomic number 17 is __________

1. cu, ag, and au are all in which group?

1. name two noble gases

1. give the symbol for two halogens.

1. what is the symbol for element with atomic number 74?

Explanation:

Question 8

The most useful property of metalloids is their varying ability to conduct electric current (they are semiconductors, having conductivity between metals and non - metals). Brittleness is more of a property of non - metals in some cases, and malleability and the ability to be pulled into wires are properties of metals. So the correct option is about their varying ability to conduct electric current.

Non - metals like carbon are found on the right - hand side of the periodic table. Metals are on the left - most side, the middle columns are for transition metals, and the bottom rows are for lanthanides and actinides.

Most non - metals are brittle. They are not metalloids (metalloids are a separate category), and non - metals are generally poor conductors (unlike metals which are good conductors), and they don't have a general property of being shiny (metals are shiny).

Answer:

a. Varying ability to conduct electric current

Question 9