Chemistry Crush (8th Grade)

Metalloids are atoms that combine properties of both metals and non-metals.  Which characteristics are included with metalloids?

• Shiny, ductile, semiconductors
• Dull, not malleable, not conductive
• Luster, liquid, silver
• No luster, not ductile

Which is an example of a physical property?

• ability to react with acid
•  state of matter
• flammability
• ability to react with oxygen

Which of the following is a physical property?

• melting point
• flammability
• ability to rust

Gold, which is in Group 11 on the periodic table, is an example of a(n) ____________

• Alkali Metal 
• Other Metal 
• Transition Metal
• Alkaline Earth Metal

What is Reactivity?

• The characteristics of a substance that can be observed without changing the identity of the substance.
• A property making a substance react with certain substances
• When a substance combines with another to form a new substance.
• I really don't know at all.

Tags

NGSS.MS-PS1-2

Is mold growing on cheese a physical or chemical change?

• Physical 
• Chemical

Tags

NGSS.MS-PS1-2

Some clues of a chemical change include..

• Melting, Breaking, Crushing
• Bending,Boiling, Foaming
• Evaporating, Cutting, production of heat
• Fizzing, Foaming, Change in color

Tags

NGSS.MS-PS1-2

How many protons does an atom of mercury have?

• 200.6
• 120
• 80
• 0

Which properties are characteristic of the group 1 metals?

• high reactivity and the formation of stable compounds
• high reactivity and the formation of unstable compounds
• low reactivity and the formation of stable compounds
• low reactivity and the formation of unstable compounds

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which group of the periodic table is composed of inert (not reactive)  gases?

• alkali metals
• alkaline earth metals
• halogens
• noble gases