Chemistry 1
Chemistry 2
Chemistry 3
Chemistry 4
Chemistry 5
Chemistry 6
100

A reaction that combines into a new substance is what kind of chemical reaction?

synthesis/combination reaction

100

the periodic table is organized by increasing _______, aka number of protons

atomic number

100

scientist who developed the Atomic Theory that we still use today

Dalton

100

the general rule that atoms prefer to have a full valence shell of 8 electrons

octet rule

100

elements that are brittle, not shiny, soft, and don’t conduct electricity.

nonmetals

100

As you go down a group, atomic radius ___?____ because there are more ___?____.

a) decreases; occupied energy levels

b) decreases; protons

c) increases; occupied energy levels

d) increases; protons

c. increases, occupied energy levels

200
What kind of bond is formed between atoms that share electrons?

covalent

200

each one can only hold 2 electrons, but there can be multiple in a sublevel

orbitals

200

What type of reaction is this:

A + B ----> AB

a) double replacement

b) decomposition

c) synthesis

d) single replacement

Synthesis.

200

 Electrons located in the outermost energy level of an atom are called

valence electrons

200

molecules that share a negative or positive charge, like NH4+, are called ____?____ ions

polyatomic

200

boiling water, melting ice cream, and shredding paper are all examples of ____?____ changes.

physical 

300

The effect of electrons repelling other electrons in the same atom and hiding valence electrons from the positive charge of the nucleus:

  1. electron protection

  2. electron shielding

  3. nuclear protection

  4. nuclear shielding

2. electron shielding

300

Ion

Mendeleev

300

The elements can be found in the far right group of the periodic table (group 18)

noble gases

300

On the periodic table, elements in _______ typically have similar chemical and physical properties.

a) trends

b) blocks

c) periods

d) groups

groups

300

What do enzymes do? 

Speed a chemical reaction

300

Combustion reactions always produce all of these EXCEPT

  1. Carbon dioxide

  2. Water

  3. Heat

  4. Oxygen 

4. oxygen

400

Elements represent unique forms of these little thingies. The building blocks of everything!

Atoms

400

When one chemical changes its state of matter, the change is called

What is Physical Change

400

What is the proper name for this formula: AlF3

Aluminum fluoride

400

Which type of solid has a "sea of electrons"?

Metallic

400

Name 4 types of chemical Reactions

Decomposition, synthesis,  single replacement, double replacement, combustion

400

Double replacement reactions occur when the _____ or _____ ions of two ionic compounds exchange places to form two new compounds.

a) Polyatomic, molecular 

b) Type I and Type II

c) Monatomic, diatomic

d) Positive, negative

d) positive and negative

500

Group 17 elements are called:

halogens

500

What is the proper formula for this compound: copper (II) iodide

CuI2

500

Which are definite signs of a chemical reaction taking place?

a. change of state

b. different color

c. precipitate formation

d. gas formation

e. change in volume

c. and d.

500

The s-sublevel has a ______ shape.

spherical 

500

an element that can only conduct electricity at extremely high temperatures

semiconductors

500

What factors influence atomic radius size?

nuclear charge/number of protons and number of shells/distance between nucleus and valence electrons

600

Explain the difference between mass number and average atomic mass: 1 minute 30 seconds

mass number = individual atoms, sum of protons and neutrons

avg atomic mass = sum of all masses of different isotopes by abundance

600

Explain electronegativity, 1 minute

The ability of an atom to pull SHARED electrons closer towards itself. 

600

What are 3 things a Lewis Diagram can show us that a regular molecular formula cannot? Think of a water molecule. 

1. arrangement of atoms

2. types of bonds (single, double, triple)

3. valence electrons/lone pairs

4. molecular geometry/shape

600

Explain ionization energy: 1 minute

Energy required to remove an electron from the outermost shell of an atom. Increases as more electrons are taken. 

600

Why are ionic solids brittle but metals are not?

ionic solids have a crystal lattice structure composed of positive and negative ions that, if shifted, can cause similar ions to interact and cause a repulsive reaction.

metals have a sea of free electrons that move around each cation so when force/stress is applied to the metal, the electrons are able to move between cations and prevent any repulsive forces from occurring. 

600

Explain why fluorine has a smaller atomic radius than oxygen. 2 minutes

fluorine and oxygen have the same number of occupied energy levels/shells, however fluorine has a greater number of protons/stronger nuclear charge that pulls in the valence electrons more tightly compared to oxygen.