ChemCon A review

Cutting paper is an example of what kind of change?

• chemical change

• scientific change

• physical change

This particle has a negative charge

• proton

• electron

• neutron

• quark

The formula for density is

• mass/volume

• weight

• volume/mass

• cm³

How many milliliters are in 2.5 liters?

• 25

• 2500

• 250

• 250000

(5.0x10⁴) (3.0x10²) =

• 15x10⁸

• 1.5x10⁸

• 1.5x10⁷

• 20x10⁶

Matter is neither created nor destroyed according to the Law of ________________________

• Conservation of Weight

• Conservation of Matter

• Destruction of Matter

• Creation of Matter

Which of these is an element?

• milk

• water

• air

• mercury

Calculate the density of a rectangular solid that has a mass of 90.0 g and a length of 3.0 cm a height of 5.0 cm and a width of 2.0 cm.

• 30

• 20

• 3.0

• 0.30

Chemical bonds are made by gaining, losing or sharing.....

• protons

• neutrons

• either a or b

• electrons

Ions may have a .....

• positve charge

• negative charge

• either a or b