Chemistry Mid-term

Safety

100

Running in the classroom is?

Never permitted

200

If there is and emergency in the classroom?

Follow the teacher's instructions

300

If the teacher is injured or not conscious?

Get assistance

400

When carrying sharp objects in the classroom?

Carry the point down towards the floor

500

If you are injured in the classroom?

Notify the instructor immediately

Miscellaneous

100

Which of the following statements is true about scientific theories?

Scientific theories summarize patterns in nature

200

The type of graph used to show how a part of something relates to the whole is called?

Circle graph

300

How do scientists who speak different languages make their data understandable to one another?

They all use SI. or Standard International-Units

400

A measurement must include both a number and a(an)

SI Unit

500

What happens when the data in an investigation do not support the original hypothesis?

You modify or change the process -- redesign your experiment -- retest

Atom

100

What are the building blocks of all matter?

Atom

200

What are the parts of the Atom?

Electrons on the out side of the Atom.

Protons and Neutrons on the inside of the Atom.

300

Proton

Positive charge, 

also can determine the atomic number,

added with the neutrons to get the mass number.

400

Electrons

Negatively charged,

on the outside of the atom,

Electrons in the outermost are call valence electrons,

can be used to determine atomic number.

500

Neutrons

No charge,

added with protons to determine the mass number

inside the nucleus.

Conversions

100

Dimensional Analysis-

Convert 12,345 mm into km.

12,345 s|1 hr|1 day|1 yr           =   12,345    =0.023 years

             |60 s|24 hr|365 days        525,600

200

Convert 1234mm into feet.

1234 mm|0.001 m|3.28 ft    = 4.047   =4.05 ft

                |1 m|1 m             

300

Convert 32 years into hours.

32 yr |365 days|24 hr     =280,320 hrs

        |1 yr|1 day

400

Convert 35 inches into meeters.

35 in|2.54 cm|0.01 m       = 0.889m

|1 in|1 cm       

500

Convert 120 ft/min into km/hr.

120 ft| 1 mile|1.61 km| 60 min           =  11592    = 2,195 km\hr

             |5280 ft|1 mile|1 hr                   5280

Periodic Table

100

Metals

Most metals are ductile,

lustrous,

good conductors of heat and electricity

200

Metaloids

Semi-conductors,

some properties of metal not all.

300

Nonmetals

Dull, 

brittle,

poor conductors

400

Periodic Table

Organized by atomic number,

row left to right,

periods up and down

500

Types of elements.

Metals, 

metalloids, 

non-metals