METALS AND NON-METALS

All of the following would classify an element as a metal except?

• Dull
• Luster
• Malleable
• Hard

Iron is a good conductor, malleable and magnetic. What type of element is Iron? 

• Metal
• Nonmetal
• Metalloid
• Pretty

At room temperature metals are ____________.

• plasma
• gases
• liquid
• solid

Name the metal which is in liquid state.

• Iron

• Mercury

• Zinc

• Aluminium

John was observing the physical properties of elements in order to classify them as either a metal, nonmetal, or metalloid. The first element was dull, brittle, and did not conduct heat. What would its classification be? 

• metal 
• nonmetal 
• metalloid

A student tested the conductivity of four elements using an incomplete electrical circuit. When the element is placed in the circuit, the bulb lights up brightly, lights up dimly, or does not light up at all based on the element’s ability to conduct electricity. The table below shows the results of her investigation. Based on the results of the conductivity test, which element is classified as a metal? 

• Hydrogen
• Arsenic
• Krypton
• Copper

The metal which can be cut with knife.

• Iron

• Silver

• Sodium

• Magnisium

A chemical bond resulting from the electrostatic attraction between positive and negative ions is called a(n)

• covalent bond.
• ionic bond.
• charged bond.
• dipole bond.

Potassium (K), an alkali metal, and magnesium (Mg), an alkaline earth metal, both combine readily with bromine (Br), a halogen. What compound will each element (K and Mg) most likely form with bromine?

• KBr and Mg₂Br

• KBr and MgBr

• K₂Br and Mg₂Br

• KBr and MgBr₂

Unknown element W has 2 valence electrons. Unknown element X has 7 valence electrons. Which formula shows the most likely outcome when elements W and X react?

• WX

• WX₂

• W_2X

• W₂X₂