Physical and Chemcial Change Flashcards
Atoms are the building blocks of……?
Matter
The smallest representative of an element is an….?
Atom
The smallest piece of an element is an…?
Element
A molecule can be made up of different atoms which is called……
Compound
A molecule can be made up of many of the same atoms, this is called
Elemental
Atoms of the same element are
Identical
Metals are (3 words)
Shiney, malleable, and conductors
Atoms are composed of 3 subatomic particles
Protons, neutons, electrons
The nucleus contains (2)
Protons and Neutrons
Electrons surround the …
Nucleus
Atoms have a nucleus and a cloud of
Electrons
Subatomic means
Smaller or below the level of an atom
Proton and neutrons each have a mass of
one (they weigh the same)
Electrons are very very very tiny and they have…
the 1/2000 mass of a proton
Protons have a positive charge and neutrons
have no charge (are neutral)
Electrons have a…
Negative charge
The nucleus is made up of
Positive and neutral particles
The atomic cloud is made up of
negative particles
positive (protons) and neutral (neutrons) particles like to
Group together
negative (electrons) particles stay
far apart
What is the charge and mass of a proton
+, 1
What is the charge and mass of an electron
-, 1/2000
What is the charge and mass of a neutron
0, 1
The atomic number of an element is
the number of protons in the nucleus of an atom
So Boron has an atomic number 5, so boron has
5 protons
On your periodic table, the number of protons is equal to the number of….? Because the elements are all….?
Electrons, Neutral
Neutral means that an element has the same (4 words)
Positive and Negative Charges
The atoms on the periodic table are……..on their own but ……….
unstable, neutral
Proton number is equal to the number of…
Electrons
Atoms in the periodic table are …..
Neutral
Elements are arranged in the periodic table in order of
increasing atomic number
An atomic number is always a
whole number
The mass number is always……..than the atomic number
bigger
Change the atomic number you change the
element
The mass number tells us how much the element
weighs
Protons + Neutrons equal the
mass number
Atomic number (P+ (=) e-) so mass equals
(P+ (+) N)
neutrons = mass number -
atomic number
ON the period table the atomic number tells us the number of
protons and electrons (11 protons and 11 electrons for NA)
On the PT the mass number tells us the number of
protons + neutrons (11 Protons + 12 neutrons = 23 Mass number for NZ)
Everything is neutral in the periodic table because….
you have one electron (-) and one proton (+)
What is an isotope?
An isotope is an atom of an element and has the same atomic number, but a different number of neutrons
An isotope can have slightly different
mass numbers
All elements have isotopes that occur
naturally
The isotope has the same number of
protons
The isotope has a different number of
neutrons
The isotope can have a different
mass number
The relative atomic weight (RAM) is the ………(2 words) of all the isotopes for that element.
average mass
On the periodic table was is the most common isotope mass number for Mg?
24
Atomic weight is rounded to the nearest whole number, it gives the mass number for the most….. …… of that …….
common isotope for that number
The RAM is the average number of isotopes mass so not a….
whole number
One element (atom) can have different weight (P+N) but still retains its…..
proton number or atomic number
True or false, relative mass is not a whole number (unlike atomic mass)
True as it is an average of all the isotopes in that element
When the atomic weight (RAM) is rounded to the nearest whole number, it gives the …….. ………. for the most ……. ……….. of that element
mass number , common isotope
Elections have energy levels for placement in the atomic cloud. They are…
two seats in the front then placed in eight seats
What is the name for the electrons in the outer shell
Valance electrons
The row of the periodic table will tell you how many …. levels there are in the element
energy
The columns (ignoring the ones in the middle) of the periodic table will tell you how many…..
valance electrons there are
C6H12O6 + 02 - CO2 + H20 is this a physical or chemical change
Chemical
Using a solvent to remove a grease spot a physical or chemical change
Physical
Is Wax melting a physical or chemical change
physical
Is digestion of food a physical change or chemical change
Chemical
Is a candle burning a physical change or a chemical change?
chemical
Is photosynthesis a physical or chemical change
Chemical
C6H12O6(s) - C6H12O6 (l) physical or chemical change?
Physical
Sublimation of dry ice to C02 gas is a physical or chemical change
Physical
