Basic Chemistry
Ch 2: Basic Building Materials
Ch 3: A World of Particles
Ch 4: Moving Electrons
Ch 5: Building with Matter
100

All matter is made of__

Atoms (or elements)

100

Define the conservation of matter.

Matter can not be created or destroyed as shown in the copper cycle.

100

Most of the mass of an atom is found __

protons and neutrons in the nucleus

100

Flame tests tell you which __ is in a compound?

metal
100

What is conductivity?

How well energy flows through a substance

200

Give one example for each; extensive and intensive properties

Extensive: volume, mass, size

Intensive: density, boiling point, melting point

200

Most elements on the periodic are: 

metals (also solids or non radioactive)

200

Isotopes differ in their number of_

neutrons

200

What are the labels of the subshells?

s, p, d, f

200

Name an important property of ionic compounds

dissolves, conducts electricity when dissolved

300

What do the following represent?

(s)

(l)

(g)

(aq)

solid, liquid, gas, aqueous

300

Group one is also called the __metals

Alkali

300

Nuclear reactions happen in the _ of the atoms

nucleus

300

How are anions and cations different?

anions are negative (have gained electrons), cations are positive (have lost electrons)

300

Name 4 types of bonds

Ionic, metallic, molecular covalent, network covalent

400

Why do hydrogen and oxygen have different properties than H2O?

When atoms combine chemically, they form new substances with new properties.

400

The main group elements are found in groups_

1, 2, 3a-8a

400

What is the difference between fission and fusion?

fission - splitting nucleuses

Fusion - combining nucleuses

400

What is the rule of zero charge?

The positive and negative charges in an ionic compound must combine to equal 0

400

Describe the bonds in ionic and metallic substances.

ionic: electrons are transferred (given or taken) between atoms.

Metallic: electrons flow freely in the substance

500

The first model of an atom was called the __

Plum pudding model

500

An atom's atomic number tells you what about the atom?

# of protons (and # of electrons in a neutral atom)

500

What is the difference between alpha and beta decay?

Alpha: release a He atom and energy

Beta: neutron breaks into proton and electron, release an electron 


500

Potassium (group 1a) and Selenium (group 6a) combine in what ratio?

2:1

500

Describe the bonds in covalent molecular and covalent network substances

covalent molecular: bonds are strong within molecules only

covalent network: bonds are strong between all the atoms in the substance