Classroom 309

Wires are usually a ---------

• nonmetal

• metalloid

• metal

• plastic

what is the symbol for chlorine

• Ch

• C

• Cl

• Ce

Which two physcial characteristics describe gold

• malleable

• insulator

• semi-conductor

• ductile

• dull

which ones are compounds

1) Cr 2) KF 3) H2SO4 4)Cs 5) Al2O2 6)CaO

• 2,3,5,and 6

• 2 and 6

• 1 and 4

• 1,2,3, and 4

Which of followinfg statements are true about compounds?

I. Compounds are made from two or more elements

II. A compound is a pure substance

III. Compounds are represented by a chemical symbol

IV. Compounds are represented by a chemical formula

• I, III

• I, IV

• I,II,III

• II, III, IV

During a chemical reaction what happens to the mass?

• physical change and mass remains constant

• chemical change and the mass of remains constant

• physical change and mass increases

• chemical change and mass increases

Tags

NGSS.MS-PS1-5

an element that does not reflect light, breaks easily., and is an insulator

• metal

• nonmetal

• metalloid

• semi-conductor

which of following is an element

• water H2O

• Copper Cu

• Carbon Monoxide CO

• Salt NaCl

An element that reflects light, can be hammered without breaking, and used for wiring

• Metal

• Nonmetal

• metalloid

• plastic

Which law is requires balancing of the chemical equation

• Newtons Law of Motion

• Law of Mass-Action

• The Law of Conservation of Mass

• the Law of Chemical Reactions

Tags

NGSS.MS-PS1-5