PG-Chemistry Part 1

Match the following

• composed of 2 or more simpler substances

• solvent

• lesser quantity in a solution

• elements

• cannot be broken down into a simpler substance

• compound

• greater quantity in a solution

• solute

• always have the exact same composition

• pure substance

Match the following

• chocolate chip cookie

• Democritus

• planetary model

• Aristotle

• atomos

• Rutherford

• electrons in energy levels

• Thomson

• air, fire, earth, and water

• Bohr

What is the wavelength of a 1.5 Hz wave?

Mathematical Equivalence

ON

What is the energy of a 6.48 x 10¹⁴ m wave?

Mathematical Equivalence

ON

The group of elements that are malleable is ​ (a)   . While (b)   are brittle. Metals are on the ​ (c)   side of the Periodic Table, and nonmetals are on the ​ (d)   . The smallest group of elements that are a combination of the other two are called ​ (e)   .

• metals
• nonmetals
• left
• right
• metalloids

Match the following

• shiny

• brittle

• able to transmit electricity and/or heat

• luster

• transmits some electricity

• malleable

• breaks easily

• semiconductor

• shaped into a sheet

• conductive

Electrons in an atom's outermost orbital are called _____.

___ are positively charged ions.

Negatively charged ions are called ___

A sea of electrons forms a ​ (a)  

• metallic bond
• ionic bond
• covalent bond