Chem Flashcards
(37 cards)
What are the three states of matter
Solid, liquid and gas
What is freezing
When a substance changes from a liquid state to a solid-state
What is boiling
The process by which a liquid turns into a vapor when it is heated to its boiling point
What is evaperation
The process where an element or compound transitions from its liquid state to its gaseous state below the temperature at which it boils
What is condensing
When a gas turns to a liquid
What is sublimation
When a substance changes from a solid phase to a gas phase without turning into a liquid
What is deposition
When a gas turns into a solid without turning into a liquid
What are the three parts of an atom
Proton, neutron and electron
What is the charge of a neutron
Neutral eletric charge (neither posative nor negative)
0
Relative mass of an electron
1
What is the charge of a proton
+1
What is the charge of an electron
-1
What is a group on the periodic table
The vertical collums are called groups
What are periods in a periodic table
The horizontal rows
What is an element
A substance made up of only one sort of atom
What is a compound
A substance made up of 2 or more different elements that have been chemically joined
What is a mole
the Avogadro constant number of particles (which is 6.02 × 10 23 )
What is Avogadro’s number
6.02 x 10^23
Relative mass of an electron
Almost zero 0.0005
What is the atomic number
The number of protons in the nucleus of an atom or element (the smaller number of the two on the periodic table most of the time)
Mass number
is the larger of the two numbers shown in most periodic tables, the sum of the protons and nuetrons in an atom’s nucleus is the mass number.
Mixture
2 or more elements/compounds mixed together but not joined
What symbol is hydrogen
H
What symbol is sodium
Na