Show:
Atoms
Elements
Isotopes
Chemical Compounds/Periodic Table/bonds
Acids and Bases
100
The smallest unit of matter is?
What is an atom
100
What is another name for a pure substance?
What an element
100
Isotopes are elements that differ in the number of
What is neutrons
100
What is 2 or more
A compound is formed by mixing how many pure substances?
100
What is the name of the scale used to measure acids and bases?
Ph scale
200
What is the name of the particles inside the atom and what are their charges?
What is protons (positive charge) neutrons (no charge)
200
Elements are represented by how many letters
What is one or two
200
The total number of protons and neutrons in the nucleus of an atom
What is the atomic mass
200
What is the bond formed when two atoms share a pair of electrons?
What is hydrogen bond
200
What is the universal solvent
What is water
300
What is the subatomic particle that has a negative charge
What is electrons
300
What does the atomic symbol stand for
What is the name of the element
300
Isotopes have the same amount of what?
What is electrons
300
Elements on the periodic table are located numerical by two things (remember our element project "the last known address")
What is a row and column
300
What does the number start with for an acid what does it end with for a base
acids start at o, bases end at 14
400
How many years ago did the concept of the atom come about?
What is 2,500 years ago
400
What does the atomic number stand for
What is the number of protons in the atom
400
Which element is an isotope? carbon 14 or Neon Ne
What is carbon 14
400
What is it when a molecule's charge is unevenly distributed?
polar
400
What is acid taste like and how do they feel?
Acids taste sour feel like water
500
What is the name of the Greek philosopher that came up with the concept of the atom?
Who is Democritus
500
What is the atomic mass of an element
What is the number of protons and neutrons
500
What is the sharing of electrons?
What is covalent bonds
500
What is the attraction between molecules with different substances
Adhesion
500
How do bases taste and how do they feel
acids taste bitter and feel slippy