The force that holds atoms or ions together as a unit.
100
What fruits have acid in it?
Lemon, lime, green apple, pickle, and ect.
100
What are examples of chemical changes?
Flammability,color change, the production of gas, and formation of a precipitate.
100
What did Isaac Newton discover?
The Laws of Gravity.
200
How are the elements in the modern periodic table arranged?
They are arranged by the increasing atomic number.
200
How many atoms are in a diatomic molecule?
Two atoms.
200
What is an indacator?
Any substance thatchanges color in the presence of an acid or base.
200
What is the energy stored in chemical bonds?
Chemical Energy.
200
Who discovered acids?
Svanté Arrhenius
300
What does oxygen, sulfur, and selenium all have in common?
They are all nonmetals.
300
What is metallic bond?
Is the attraction between a metal cation and the shared electron that surround it.
300
What are the side effects a acid might have?
Sour taste,slippery feel, and sour smell.
300
Is a change chemical or physical?
When matter undergoes a chemical change the matter changes and physical matter stays the same.
300
Otto Rohm and Otto Haas are the inventors of...
Acrylate polymers; these are used for things like Plexiglas and the plastic layer of safety glass.
400
How many valenece electrons does an alkali-metal have?
A single valence electron.
400
Describe an ionic compound?
The name of an ionic compound must distinguish the compound from other ionic copmpounds containing the same elements.The formula of an ionic compounmd describes the ratio of the ions and the compound.
400
What is the PH scale?
It is the concentration of hydronium ions in a solution from 0 to 14.
400
Is braiding and cutting hair physical or chemical changes?
It's physical.
400
Who is William Gilbert and what did he do?
He is known for his work with magnetic fields.
500
What is the purpose of Mendeleev's strategy for the periodic table?
Mendeleev's strategy for organizing the elements was modeled on a deck of cards with cards representing the elements.
500
What does the subscript 2 in the formula for a hydrogen molecule indicate?
When two atoms share two pairs of elctrons, the bond is called a double bond.
500
True or false, is there a such thing of acids and bases being weak or strong?
True
500
What are some physucal properties?
Conductivity, hardness, melting and boilind point, and density.
500
What are the phases of the moon?
Full Moon,Waxing Gibbous, Wanning Gibbous, Waxing Cresent, and New Moon.