Show:
Physical and Chemical Changes
Atoms and Molecules
Elements and Compounds
Periodic Table
Miscellaneous
100
color, shape, hardness, density
What are physical properties?
100
place where the electrons are stored
What is the electron cloud?
100
H
What is hydrogen?
100
atomic number
What is the number that is in the top of each element's box called?
100
process by which the substance changes into a new substance
What is a chemical change?
200
physical properties are changed, but substance remains the same
What is a physical change?
200
everything is made of this
What is matter?
200
O
What is oxygen?
200
this word means rows in the period table
What are periods?
200
two or more atoms combined
What is a molecule?
300
definite shape and definite volume, doesn't take the shape of the container
What is a solid?
300
positively charged particles in the nucleus
What are protons?
300
B
What is boron?
300
this word means columns in the periodic table
What are groups or families?
300
solid to gas
What is sublimation?
400
liquid to a gas
What is vaporization?
400
negatively charged particles in the atom
What is an electron?
400
K
What is potassium?
400
this family is the most reactive
What are Alkali Metals?
400
when vaporization takes place at the surface of a liquid
What is evaporation?
500
not found on earth, such high energy, dangerous to living things, found in stars and sun
What is plasma?
500
number of electrons
What is the atomic number?
500
Pb
What is lead?
500
add the protons and neutrons together to find the...
What is atomic mass?
500
tell me what is wrong with the chemical symbol pB
What is P should be capitalized and b should be lower case?